628764 has 24 divisors (see below), whose sum is σ = 1481088. Its totient is φ = 207600.

The previous prime is 628759. The next prime is 628781. The reversal of 628764 is 467826.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 628764.

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, 1639 + ... + 1985.

It is an arithmetic number, because the mean of its divisors is an integer number (61712).

2⁶²⁸⁷⁶⁴ is an apocalyptic number.

It is an amenable number.

628764 is an abundant number, since it is smaller than the sum of its proper divisors (852324).

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

628764 is a wasteful number, since it uses less digits than its factorization.

628764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 503 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 628764 is about 792.9464042418. The cubic root of 628764 is about 85.6700899142.

The spelling of 628764 in words is "six hundred twenty-eight thousand, seven hundred sixty-four".