628634857720 has 16 divisors (see below), whose sum is σ = 1414428429960. Its totient is φ = 251453943072.

The previous prime is 628634857699. The next prime is 628634857729. The reversal of 628634857720 is 27758436826.

It is a happy number.

628634857720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628634857729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7857935682 + ... + 7857935761.

Almost surely, 2^628634857720 is an apocalyptic number.

It is an amenable number.

628634857720 is an abundant number, since it is smaller than the sum of its proper divisors (785793572240).

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

628634857720 is a wasteful number, since it uses less digits than its factorization.

628634857720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15715871454 (or 15715871450 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 58.

The spelling of 628634857720 in words is "six hundred twenty-eight billion, six hundred thirty-four million, eight hundred fifty-seven thousand, seven hundred twenty".