628864056828 has 120 divisors (see below), whose sum is σ = 1891272018944. Its totient is φ = 178485444000.

The previous prime is 628864056823. The next prime is 628864056829. The reversal of 628864056828 is 828650468826.

628864056828 is a `hidden beast` number, since 6 + 2 + 8 + 8 + 6 + 40 + 568 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628864056823) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 575668 + ... + 1260603.

Almost surely, 2^628864056828 is an apocalyptic number.

It is an amenable number.

628864056828 is an abundant number, since it is smaller than the sum of its proper divisors (1262407962116).

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

628864056828 is a wasteful number, since it uses less digits than its factorization.

628864056828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836445 (or 1836434 counting only the distinct ones).

The product of its (nonzero) digits is 70778880, while the sum is 63.

The spelling of 628864056828 in words is "six hundred twenty-eight billion, eight hundred sixty-four million, fifty-six thousand, eight hundred twenty-eight".