172136968 has 64 divisors (see below), whose sum is σ = 360495360. Its totient is φ = 76640256.

The previous prime is 172136963. The next prime is 172136969. The reversal of 172136968 is 869631271.

It is a super-2 number, since 2×172136968² = 59262271504466048, which contains 22 as substring.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (172136963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 353221 + ... + 353707.

It is an arithmetic number, because the mean of its divisors is an integer number (5632740).

Almost surely, 2^172136968 is an apocalyptic number.

It is an amenable number.

172136968 is an abundant number, since it is smaller than the sum of its proper divisors (188358392).

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

172136968 is a wasteful number, since it uses less digits than its factorization.

172136968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646 (or 642 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The square root of 172136968 is about 13120.0978654887. The cubic root of 172136968 is about 556.2773576075.

The spelling of 172136968 in words is "one hundred seventy-two million, one hundred thirty-six thousand, nine hundred sixty-eight".