172869904 has 45 divisors (see below), whose sum is σ = 355546533. Its totient is φ = 81412416.

The previous prime is 172869887. The next prime is 172869937. The reversal of 172869904 is 409968271.

The square root of 172869904 is 13148.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 157251600 + 15618304 = 12540^2 + 3952^2 .

It is a Duffinian number.

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 8 ways as a sum of consecutive naturals, for example, 999162 + ... + 999334.

Almost surely, 2^172869904 is an apocalyptic number.

172869904 is the 13148-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172869904

172869904 is an abundant number, since it is smaller than the sum of its proper divisors (182676629).

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

172869904 is an equidigital number, since it uses as much as digits as its factorization.

172869904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 46.

The cubic root of 172869904 is about 557.0657576916.

The spelling of 172869904 in words is "one hundred seventy-two million, eight hundred sixty-nine thousand, nine hundred four".