764728 has 16 divisors (see below), whose sum is σ = 1518480. Its totient is φ = 359808.

The previous prime is 764723. The next prime is 764783. The reversal of 764728 is 827467.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 764693 and 764702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764723) 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, 2676 + ... + 2947.

It is an arithmetic number, because the mean of its divisors is an integer number (94905).

2⁷⁶⁴⁷²⁸ is an apocalyptic number.

It is an amenable number.

764728 is a deficient number, since it is larger than the sum of its proper divisors (753752).

764728 is a wasteful number, since it uses less digits than its factorization.

764728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5646 (or 5642 counting only the distinct ones).

The product of its digits is 18816, while the sum is 34.

The square root of 764728 is about 874.4872783523. The cubic root of 764728 is about 91.4469020166.

The spelling of 764728 in words is "seven hundred sixty-four thousand, seven hundred twenty-eight".