764617740 has 24 divisors (see below), whose sum is σ = 2140929840. Its totient is φ = 203898048.

The previous prime is 764617739. The next prime is 764617747. The reversal of 764617740 is 47716467.

It is a junction number, because it is equal to n+sod(n) for n = 764617692 and 764617701.

It is not an unprimeable number, because it can be changed into a prime (764617747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6371755 + ... + 6371874.

It is an arithmetic number, because the mean of its divisors is an integer number (89205410).

Almost surely, 2^764617740 is an apocalyptic number.

It is an amenable number.

764617740 is an abundant number, since it is smaller than the sum of its proper divisors (1376312100).

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

764617740 is a wasteful number, since it uses less digits than its factorization.

764617740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12743641 (or 12743639 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 42.

The square root of 764617740 is about 27651.7221886811. The cubic root of 764617740 is about 914.4250680678.

The spelling of 764617740 in words is "seven hundred sixty-four million, six hundred seventeen thousand, seven hundred forty".