| Base | Representation |
|---|---|
| bin | 10010101100111… |
| … | …11001101111100 |
| 3 | 101221012211121000 |
| 4 | 21112133031330 |
| 5 | 310130434410 |
| 6 | 23322410300 |
| 7 | 3613354122 |
| oct | 1126371574 |
| 9 | 357184530 |
| 10 | 156889980 |
| 11 | 80618845 |
| 12 | 44660990 |
| 13 | 26672010 |
| 14 | 16b9d912 |
| 15 | db90dc0 |
| hex | 959f37c |
156889980 has 96 divisors (see below), whose sum is σ = 525672000. Its totient is φ = 38617344.
The previous prime is 156889979. The next prime is 156889981. The reversal of 156889980 is 89988651.
It is an interprime number because it is at equal distance from previous prime (156889979) and next prime (156889981).
It is a super-2 number, since 2×1568899802 = 49228931648800800, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (54).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (156889981) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4155 + ... + 18194.
It is an arithmetic number, because the mean of its divisors is an integer number (5475750).
Almost surely, 2156889980 is an apocalyptic number.
156889980 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 156889980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262836000).
156889980 is an abundant number, since it is smaller than the sum of its proper divisors (368782020).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
156889980 is a wasteful number, since it uses less digits than its factorization.
156889980 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 22380 (or 22372 counting only the distinct ones).
The product of its (nonzero) digits is 1244160, while the sum is 54.
The square root of 156889980 is about 12525.5730407834. The cubic root of 156889980 is about 539.3430282033.
The spelling of 156889980 in words is "one hundred fifty-six million, eight hundred eighty-nine thousand, nine hundred eighty".
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