764065836 has 72 divisors (see below), whose sum is σ = 1990729104. Its totient is φ = 246913920.

The previous prime is 764065823. The next prime is 764065843. The reversal of 764065836 is 638560467.

764065836 is a `hidden beast` number, since 7 + 64 + 0 + 6 + 583 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 764065791 and 764065800.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 440026 + ... + 441758.

Almost surely, 2^764065836 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 764065836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (995364552).

764065836 is an abundant number, since it is smaller than the sum of its proper divisors (1226663268).

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

764065836 is a wasteful number, since it uses less digits than its factorization.

764065836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111 (or 2106 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The square root of 764065836 is about 27641.7408279580. The cubic root of 764065836 is about 914.2050032779.

The spelling of 764065836 in words is "seven hundred sixty-four million, sixty-five thousand, eight hundred thirty-six".