640376330 has 16 divisors (see below), whose sum is σ = 1257466464. Its totient is φ = 232864080.

The previous prime is 640376329. The next prime is 640376351. The reversal of 640376330 is 33673046.

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, 2910692 + ... + 2910911.

It is an arithmetic number, because the mean of its divisors is an integer number (78591654).

Almost surely, 2^640376330 is an apocalyptic number.

640376330 is a deficient number, since it is larger than the sum of its proper divisors (617090134).

640376330 is a wasteful number, since it uses less digits than its factorization.

640376330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5821621.

The product of its (nonzero) digits is 27216, while the sum is 32.

The square root of 640376330 is about 25305.6580629708. The cubic root of 640376330 is about 861.9427550840.

The spelling of 640376330 in words is "six hundred forty million, three hundred seventy-six thousand, three hundred thirty".