172968894 has 48 divisors (see below), whose sum is σ = 450852480. Its totient is φ = 46818000.

The previous prime is 172968881. The next prime is 172968911. The reversal of 172968894 is 498869271.

It is a self number, because there is not a number n which added to its sum of digits gives 172968894.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33732 + ... + 38519.

It is an arithmetic number, because the mean of its divisors is an integer number (9392760).

Almost surely, 2^172968894 is an apocalyptic number.

172968894 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

172968894 is an abundant number, since it is smaller than the sum of its proper divisors (277883586).

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

172968894 is a wasteful number, since it uses less digits than its factorization.

172968894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72285 (or 72282 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 172968894 is about 13151.7639121146. The cubic root of 172968894 is about 557.1720677274.

The spelling of 172968894 in words is "one hundred seventy-two million, nine hundred sixty-eight thousand, eight hundred ninety-four".