764931072 has 66 divisors (see below), whose sum is σ = 2042914188. Its totient is φ = 254466048.

The previous prime is 764930981. The next prime is 764931077. The reversal of 764931072 is 270139467.

It is a super-2 number, since 2×764931072² = 1170239089822138368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 764931072.

It is not an unprimeable number, because it can be changed into a prime (764931077) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1532679 + ... + 1533177.

Almost surely, 2^764931072 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 764931072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1021457094).

764931072 is an abundant number, since it is smaller than the sum of its proper divisors (1277983116).

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

764931072 is an frugal number, since it uses more digits than its factorization.

764931072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 764931072 is about 27657.3872952598. The cubic root of 764931072 is about 914.5499581456.

The spelling of 764931072 in words is "seven hundred sixty-four million, nine hundred thirty-one thousand, seventy-two".