765975728 has 80 divisors (see below), whose sum is σ = 1791313920. Its totient is φ = 309961728.

The previous prime is 765975703. The next prime is 765975731. The reversal of 765975728 is 827579567.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1261601 + ... + 1262207.

It is an arithmetic number, because the mean of its divisors is an integer number (22391424).

Almost surely, 2^765975728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 765975728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (895656960).

765975728 is an abundant number, since it is smaller than the sum of its proper divisors (1025338192).

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

765975728 is a wasteful number, since it uses less digits than its factorization.

765975728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234 (or 1228 counting only the distinct ones).

The product of its digits is 7408800, while the sum is 56.

The square root of 765975728 is about 27676.2665112186. The cubic root of 765975728 is about 914.9660982592.

The spelling of 765975728 in words is "seven hundred sixty-five million, nine hundred seventy-five thousand, seven hundred twenty-eight".