172856072 has 32 divisors (see below), whose sum is σ = 343807200. Its totient is φ = 81244800.

The previous prime is 172856069. The next prime is 172856081. The reversal of 172856072 is 270658271.

It is a Harshad number since it is a multiple of its sum of digits (38).

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 7 ways as a sum of consecutive naturals, for example, 15572 + ... + 24252.

It is an arithmetic number, because the mean of its divisors is an integer number (10743975).

Almost surely, 2^172856072 is an apocalyptic number.

It is an amenable number.

172856072 is a deficient number, since it is larger than the sum of its proper divisors (170951128).

172856072 is a wasteful number, since it uses less digits than its factorization.

172856072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8837 (or 8833 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 172856072 is about 13147.4739779168. The cubic root of 172856072 is about 557.0508996222.

The spelling of 172856072 in words is "one hundred seventy-two million, eight hundred fifty-six thousand, seventy-two".