280968172 has 12 divisors (see below), whose sum is σ = 496046376. Its totient is φ = 139240640.

The previous prime is 280968157. The next prime is 280968173. The reversal of 280968172 is 271869082.

It is a super-2 number, since 2×280968172² = 157886227354043168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (280968173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310354 + ... + 311257.

It is an arithmetic number, because the mean of its divisors is an integer number (41337198).

Almost surely, 2^280968172 is an apocalyptic number.

It is an amenable number.

280968172 is a deficient number, since it is larger than the sum of its proper divisors (215078204).

280968172 is a wasteful number, since it uses less digits than its factorization.

280968172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621728 (or 621726 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 280968172 is about 16762.1052377081. The cubic root of 280968172 is about 654.9664314712.

The spelling of 280968172 in words is "two hundred eighty million, nine hundred sixty-eight thousand, one hundred seventy-two".