640384824 has 16 divisors (see below), whose sum is σ = 1600962120. Its totient is φ = 213461600.

The previous prime is 640384819. The next prime is 640384841. The reversal of 640384824 is 428483046.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13341327 + ... + 13341374.

Almost surely, 2^640384824 is an apocalyptic number.

It is an amenable number.

640384824 is an abundant number, since it is smaller than the sum of its proper divisors (960577296).

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

640384824 is a wasteful number, since it uses less digits than its factorization.

640384824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26682710 (or 26682706 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 39.

The square root of 640384824 is about 25305.8258904941. The cubic root of 640384824 is about 861.9465660251.

The spelling of 640384824 in words is "six hundred forty million, three hundred eighty-four thousand, eight hundred twenty-four".