640371124 has 12 divisors (see below), whose sum is σ = 1121568448. Its totient is φ = 319923000.

The previous prime is 640371101. The next prime is 640371143. The reversal of 640371124 is 421173046.

It is a junction number, because it is equal to n+sod(n) for n = 640371092 and 640371101.

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, 60102 + ... + 69949.

Almost surely, 2^640371124 is an apocalyptic number.

It is an amenable number.

640371124 is a deficient number, since it is larger than the sum of its proper divisors (481197324).

640371124 is a wasteful number, since it uses less digits than its factorization.

640371124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131286 (or 131284 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 640371124 is about 25305.5552003903. Note that the first 3 decimals coincide. The cubic root of 640371124 is about 861.9404193293.

The spelling of 640371124 in words is "six hundred forty million, three hundred seventy-one thousand, one hundred twenty-four".