161957832 has 32 divisors (see below), whose sum is σ = 411760800. Its totient is φ = 53070464.

The previous prime is 161957797. The next prime is 161957833. The reversal of 161957832 is 238759161.

161957832 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161957832² = 52460678692280448, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (161957833) 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, 55773 + ... + 58604.

It is an arithmetic number, because the mean of its divisors is an integer number (12867525).

Almost surely, 2^161957832 is an apocalyptic number.

161957832 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161957832 is an abundant number, since it is smaller than the sum of its proper divisors (249802968).

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

161957832 is a wasteful number, since it uses less digits than its factorization.

161957832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114445 (or 114441 counting only the distinct ones).

The product of its digits is 90720, while the sum is 42.

The square root of 161957832 is about 12726.2654380616. The cubic root of 161957832 is about 545.0888747691.

The spelling of 161957832 in words is "one hundred sixty-one million, nine hundred fifty-seven thousand, eight hundred thirty-two".