157978632 has 32 divisors (see below), whose sum is σ = 451368000. Its totient is φ = 45136704.
The previous prime is 157978553. The next prime is 157978661. The reversal of 157978632 is 236879751.
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 470007 + ... + 470342.
It is an arithmetic number, because the mean of its divisors is an integer number (14105250).
Almost surely, 2157978632 is an apocalyptic number.
157978632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.
It is an amenable number.
157978632 is an abundant number, since it is smaller than the sum of its proper divisors (293389368).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
157978632 is a wasteful number, since it uses less digits than its factorization.
157978632 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 940365 (or 940361 counting only the distinct ones).
The product of its digits is 635040, while the sum is 48.
The square root of 157978632 is about 12568.9550878345. The cubic root of 157978632 is about 540.5876455953.
The spelling of 157978632 in words is "one hundred fifty-seven million, nine hundred seventy-eight thousand, six hundred thirty-two".
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