172872756 has 36 divisors (see below), whose sum is σ = 499410912. Its totient is φ = 49392144.

The previous prime is 172872751. The next prime is 172872757. The reversal of 172872756 is 657278271.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172872751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 342750 + ... + 343253.

Almost surely, 2^172872756 is an apocalyptic number.

It is an amenable number.

172872756 is an abundant number, since it is smaller than the sum of its proper divisors (326538156).

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

172872756 is a wasteful number, since it uses less digits than its factorization.

172872756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686020 (or 686015 counting only the distinct ones).

The product of its digits is 329280, while the sum is 45.

The square root of 172872756 is about 13148.1084571128. The cubic root of 172872756 is about 557.0688211568.

It can be divided in two parts, 172872 and 756, that multiplied together give a 5-th power (130691232 = 42⁵).

The spelling of 172872756 in words is "one hundred seventy-two million, eight hundred seventy-two thousand, seven hundred fifty-six".