172808252 has 12 divisors (see below), whose sum is σ = 302877960. Its totient is φ = 86271696.

The previous prime is 172808243. The next prime is 172808309. The reversal of 172808252 is 252808271.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 30143 + ... + 35414.

It is an arithmetic number, because the mean of its divisors is an integer number (25239830).

Almost surely, 2^172808252 is an apocalyptic number.

It is an amenable number.

172808252 is a deficient number, since it is larger than the sum of its proper divisors (130069708).

172808252 is a wasteful number, since it uses less digits than its factorization.

172808252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66220 (or 66218 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 172808252 is about 13145.6552518313. The cubic root of 172808252 is about 556.9995261866. Note that the first 3 decimals are identical.

The spelling of 172808252 in words is "one hundred seventy-two million, eight hundred eight thousand, two hundred fifty-two".