664287232 has 48 divisors (see below), whose sum is σ = 1518032880. Its totient is φ = 284688384.

The previous prime is 664287229. The next prime is 664287269. The reversal of 664287232 is 232782466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8833 + ... + 37504.

It is an arithmetic number, because the mean of its divisors is an integer number (31625685).

Almost surely, 2^664287232 is an apocalyptic number.

It is an amenable number.

664287232 is an abundant number, since it is smaller than the sum of its proper divisors (853745648).

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

664287232 is an equidigital number, since it uses as much as digits as its factorization.

664287232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46366 (or 46346 counting only the distinct ones).

The product of its digits is 193536, while the sum is 40.

The square root of 664287232 is about 25773.7702325446. The cubic root of 664287232 is about 872.5399119680.

The spelling of 664287232 in words is "six hundred sixty-four million, two hundred eighty-seven thousand, two hundred thirty-two".