764628 has 12 divisors (see below), whose sum is σ = 1784160. Its totient is φ = 254872.

The previous prime is 764627. The next prime is 764629. The reversal of 764628 is 826467.

It is an interprime number because it is at equal distance from previous prime (764627) and next prime (764629).

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31848 + ... + 31871.

It is an arithmetic number, because the mean of its divisors is an integer number (148680).

2⁷⁶⁴⁶²⁸ is an apocalyptic number.

It is an amenable number.

764628 is an abundant number, since it is smaller than the sum of its proper divisors (1019532).

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

764628 is a wasteful number, since it uses less digits than its factorization.

764628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63726 (or 63724 counting only the distinct ones).

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

The square root of 764628 is about 874.4301001224. The cubic root of 764628 is about 91.4429158111.

The spelling of 764628 in words is "seven hundred sixty-four thousand, six hundred twenty-eight".