640598060 has 24 divisors (see below), whose sum is σ = 1345920576. Its totient is φ = 256112640.

The previous prime is 640598011. The next prime is 640598071. The reversal of 640598060 is 60895046.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40940 + ... + 54380.

It is an arithmetic number, because the mean of its divisors is an integer number (56080024).

Almost surely, 2^640598060 is an apocalyptic number.

It is an amenable number.

640598060 is an abundant number, since it is smaller than the sum of its proper divisors (705322516).

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

640598060 is a wasteful number, since it uses less digits than its factorization.

640598060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15833 (or 15831 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 640598060 is about 25310.0387198440. The cubic root of 640598060 is about 862.0422260274.

The spelling of 640598060 in words is "six hundred forty million, five hundred ninety-eight thousand, sixty".