| Base | Representation |
|---|---|
| bin | 110000010101100… |
| … | …1110001100000000 |
| 3 | 11012000222020120110 |
| 4 | 1200223032030000 |
| 5 | 11310204134130 |
| 6 | 424535511320 |
| 7 | 55123200624 |
| oct | 14053161400 |
| 9 | 4160866513 |
| 10 | 1621943040 |
| 11 | 7625a98a3 |
| 12 | 393228540 |
| 13 | 1cb049713 |
| 14 | 1155a7184 |
| 15 | 975d5ab0 |
| hex | 60ace300 |
1621943040 has 144 divisors (see below), whose sum is σ = 5268614400. Its totient is φ = 425127936.
The previous prime is 1621943039. The next prime is 1621943041. The reversal of 1621943040 is 403491261.
It is an interprime number because it is at equal distance from previous prime (1621943039) and next prime (1621943041).
It is a Harshad number since it is a multiple of its sum of digits (30).
It is a junction number, because it is equal to n+sod(n) for n = 1621942989 and 1621943007.
It is not an unprimeable number, because it can be changed into a prime (1621943041) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222981 + ... + 230139.
It is an arithmetic number, because the mean of its divisors is an integer number (36587600).
Almost surely, 21621943040 is an apocalyptic number.
1621943040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1621943040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2634307200).
1621943040 is an abundant number, since it is smaller than the sum of its proper divisors (3646671360).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1621943040 is an equidigital number, since it uses as much as digits as its factorization.
1621943040 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 7242 (or 7228 counting only the distinct ones).
The product of its (nonzero) digits is 5184, while the sum is 30.
The square root of 1621943040 is about 40273.3539700880. The cubic root of 1621943040 is about 1174.9296568723.
The spelling of 1621943040 in words is "one billion, six hundred twenty-one million, nine hundred forty-three thousand, forty".
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