649258928 has 20 divisors (see below), whose sum is σ = 1266274608. Its totient is φ = 322478400.

The previous prime is 649258913. The next prime is 649258949. The reversal of 649258928 is 829852946.

It is a self number, because there is not a number n which added to its sum of digits gives 649258928.

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, 131951 + ... + 136782.

Almost surely, 2^649258928 is an apocalyptic number.

It is an amenable number.

649258928 is a deficient number, since it is larger than the sum of its proper divisors (617015680).

649258928 is a wasteful number, since it uses less digits than its factorization.

649258928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268892 (or 268886 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 53.

The square root of 649258928 is about 25480.5598054674. The cubic root of 649258928 is about 865.9097773081.

The spelling of 649258928 in words is "six hundred forty-nine million, two hundred fifty-eight thousand, nine hundred twenty-eight".