764680340 has 24 divisors (see below), whose sum is σ = 1644997032. Its totient is φ = 298411520.

The previous prime is 764680337. The next prime is 764680361. The reversal of 764680340 is 43086467.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 76352644 + 688327696 = 8738^2 + 26236^2 .

It is a junction number, because it is equal to n+sod(n) for n = 764680294 and 764680303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465449 + ... + 467088.

It is an arithmetic number, because the mean of its divisors is an integer number (68541543).

Almost surely, 2^764680340 is an apocalyptic number.

It is an amenable number.

764680340 is an abundant number, since it is smaller than the sum of its proper divisors (880316692).

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

764680340 is a wasteful number, since it uses less digits than its factorization.

764680340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932587 (or 932585 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 764680340 is about 27652.8541022441. The cubic root of 764680340 is about 914.4500223442.

The spelling of 764680340 in words is "seven hundred sixty-four million, six hundred eighty thousand, three hundred forty".