280972530 has 64 divisors (see below), whose sum is σ = 773452800. Its totient is φ = 72506880.

The previous prime is 280972511. The next prime is 280972537. The reversal of 280972530 is 35279082.

It is a happy number.

It is a super-2 number, since 2×280972530² = 157891125229201800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (280972537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8415 + ... + 25154.

It is an arithmetic number, because the mean of its divisors is an integer number (12085200).

Almost surely, 2^280972530 is an apocalyptic number.

280972530 is an abundant number, since it is smaller than the sum of its proper divisors (492480270).

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

280972530 is a wasteful number, since it uses less digits than its factorization.

280972530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33616 (or 33610 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 280972530 is about 16762.2352328083. The cubic root of 280972530 is about 654.9698177728.

The spelling of 280972530 in words is "two hundred eighty million, nine hundred seventy-two thousand, five hundred thirty".