| Base | Representation |
|---|---|
| bin | 101101010101000… |
| … | …1000100001110100 |
| 3 | 10221000000112002200 |
| 4 | 1122222020201310 |
| 5 | 11103333310140 |
| 6 | 410532104500 |
| 7 | 52456145031 |
| oct | 13252104164 |
| 9 | 3830015080 |
| 10 | 1520994420 |
| 11 | 71061a690 |
| 12 | 365465130 |
| 13 | 1b31631ca |
| 14 | 10600a388 |
| 15 | 8d7e5030 |
| hex | 5aa88874 |
1520994420 has 288 divisors, whose sum is σ = 5410903680. Its totient is φ = 341729280.
The previous prime is 1520994389. The next prime is 1520994421. The reversal of 1520994420 is 244990251.
1520994420 is a `hidden beast` number, since 1 + 5 + 209 + 9 + 442 + 0 = 666.
It is a super-2 number, since 2×15209944202 = 4626848051342272800, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1520994421) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2456871 + ... + 2457489.
It is an arithmetic number, because the mean of its divisors is an integer number (18787860).
Almost surely, 21520994420 is an apocalyptic number.
1520994420 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 1520994420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2705451840).
1520994420 is an abundant number, since it is smaller than the sum of its proper divisors (3889909260).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1520994420 is a wasteful number, since it uses less digits than its factorization.
1520994420 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 735 (or 730 counting only the distinct ones).
The product of its (nonzero) digits is 25920, while the sum is 36.
The square root of 1520994420 is about 38999.9284614728. The cubic root of 1520994420 is about 1150.0300987711.
The spelling of 1520994420 in words is "one billion, five hundred twenty million, nine hundred ninety-four thousand, four hundred twenty".
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