280328232 has 64 divisors (see below), whose sum is σ = 774334080. Its totient is φ = 84119552.

The previous prime is 280328221. The next prime is 280328233. The reversal of 280328232 is 232823082.

It is a self number, because there is not a number n which added to its sum of digits gives 280328232.

It is not an unprimeable number, because it can be changed into a prime (280328233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5553 + ... + 24320.

It is an arithmetic number, because the mean of its divisors is an integer number (12098970).

Almost surely, 2^280328232 is an apocalyptic number.

It is an amenable number.

280328232 is an abundant number, since it is smaller than the sum of its proper divisors (494005848).

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

280328232 is a wasteful number, since it uses less digits than its factorization.

280328232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29922 (or 29918 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 280328232 is about 16743.0054649695. The cubic root of 280328232 is about 654.4687976024.

The spelling of 280328232 in words is "two hundred eighty million, three hundred twenty-eight thousand, two hundred thirty-two".