157831408 has 20 divisors (see below), whose sum is σ = 349484080. Its totient is φ = 67641984.

The previous prime is 157831397. The next prime is 157831439. The reversal of 157831408 is 804138751.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 704493 + ... + 704716.

It is an arithmetic number, because the mean of its divisors is an integer number (17474204).

Almost surely, 2^157831408 is an apocalyptic number.

It is an amenable number.

157831408 is an abundant number, since it is smaller than the sum of its proper divisors (191652672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

157831408 is a wasteful number, since it uses less digits than its factorization.

157831408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1409224 (or 1409218 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 157831408 is about 12563.0970703883. The cubic root of 157831408 is about 540.4196646254.

The spelling of 157831408 in words is "one hundred fifty-seven million, eight hundred thirty-one thousand, four hundred eight".