764204540 has 72 divisors (see below), whose sum is σ = 1770404496. Its totient is φ = 276883200.

The previous prime is 764204527. The next prime is 764204563. The reversal of 764204540 is 45402467.

It is a super-2 number, since 2×764204540² = 1168017157913223200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 764204497 and 764204506.

It is a congruent number.

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, 1105595 + ... + 1106285.

Almost surely, 2^764204540 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 764204540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (885202248).

764204540 is an abundant number, since it is smaller than the sum of its proper divisors (1006199956).

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

764204540 is a wasteful number, since it uses less digits than its factorization.

764204540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179 (or 1166 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 764204540 is about 27644.2496733046. The cubic root of 764204540 is about 914.2603197234.

The spelling of 764204540 in words is "seven hundred sixty-four million, two hundred four thousand, five hundred forty".