651985628 has 12 divisors (see below), whose sum is σ = 1303971312. Its totient is φ = 279422400.

The previous prime is 651985519. The next prime is 651985637. The reversal of 651985628 is 826589156.

651985628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

651985628 is an admirable number.

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, 11642573 + ... + 11642628.

It is an arithmetic number, because the mean of its divisors is an integer number (108664276).

Almost surely, 2^651985628 is an apocalyptic number.

It is an amenable number.

651985628 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

651985628 is a wasteful number, since it uses less digits than its factorization.

651985628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23285212 (or 23285210 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 50.

The square root of 651985628 is about 25534.0092425768. The cubic root of 651985628 is about 867.1202746403.

The spelling of 651985628 in words is "six hundred fifty-one million, nine hundred eighty-five thousand, six hundred twenty-eight".