157917940 has 24 divisors (see below), whose sum is σ = 335050632. Its totient is φ = 62515200.

The previous prime is 157917883. The next prime is 157917941. The reversal of 157917940 is 49719751.

157917940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 26173456 + 131744484 = 5116^2 + 11478^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157917941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38761 + ... + 42640.

It is an arithmetic number, because the mean of its divisors is an integer number (13960443).

Almost surely, 2^157917940 is an apocalyptic number.

157917940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157917940 is an abundant number, since it is smaller than the sum of its proper divisors (177132692).

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

157917940 is a wasteful number, since it uses less digits than its factorization.

157917940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81507 (or 81505 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 43.

The square root of 157917940 is about 12566.5404945036. The cubic root of 157917940 is about 540.5184093376.

The spelling of 157917940 in words is "one hundred fifty-seven million, nine hundred seventeen thousand, nine hundred forty".