172856994 has 16 divisors (see below), whose sum is σ = 357635520. Its totient is φ = 55632080.

The previous prime is 172856951. The next prime is 172857017. The reversal of 172856994 is 499658271.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 496542 + ... + 496889.

It is an arithmetic number, because the mean of its divisors is an integer number (22352220).

Almost surely, 2^172856994 is an apocalyptic number.

172856994 is an abundant number, since it is smaller than the sum of its proper divisors (184778526).

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

172856994 is a wasteful number, since it uses less digits than its factorization.

172856994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993465.

The product of its digits is 1088640, while the sum is 51.

The square root of 172856994 is about 13147.5090416398. The cubic root of 172856994 is about 557.0518900416.

The spelling of 172856994 in words is "one hundred seventy-two million, eight hundred fifty-six thousand, nine hundred ninety-four".