653990976 has 56 divisors (see below), whose sum is σ = 1922617440. Its totient is φ = 217996416.

The previous prime is 653990929. The next prime is 653991007. The reversal of 653990976 is 679099356.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 187506 + ... + 190961.

Almost surely, 2^653990976 is an apocalyptic number.

It is an amenable number.

653990976 is an abundant number, since it is smaller than the sum of its proper divisors (1268626464).

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

653990976 is a wasteful number, since it uses less digits than its factorization.

653990976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378488 (or 378472 counting only the distinct ones).

The product of its (nonzero) digits is 2755620, while the sum is 54.

The square root of 653990976 is about 25573.2472713185. The cubic root of 653990976 is about 868.0083812112.

The spelling of 653990976 in words is "six hundred fifty-three million, nine hundred ninety thousand, nine hundred seventy-six".