280425664 has 28 divisors (see below), whose sum is σ = 571514224. Its totient is φ = 136422144.

The previous prime is 280425623. The next prime is 280425697. The reversal of 280425664 is 466524082.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56844 + ... + 61579.

Almost surely, 2^280425664 is an apocalyptic number.

It is an amenable number.

280425664 is an abundant number, since it is smaller than the sum of its proper divisors (291088560).

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

280425664 is a wasteful number, since it uses less digits than its factorization.

280425664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118472 (or 118462 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 37.

The square root of 280425664 is about 16745.9148451197. The cubic root of 280425664 is about 654.5446120827.

The spelling of 280425664 in words is "two hundred eighty million, four hundred twenty-five thousand, six hundred sixty-four".