764678990 has 8 divisors (see below), whose sum is σ = 1376422200. Its totient is φ = 305871592.

The previous prime is 764678983. The next prime is 764679001. The reversal of 764678990 is 99876467.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38233940 + ... + 38233959.

It is an arithmetic number, because the mean of its divisors is an integer number (172052775).

Almost surely, 2^764678990 is an apocalyptic number.

764678990 is a deficient number, since it is larger than the sum of its proper divisors (611743210).

764678990 is a wasteful number, since it uses less digits than its factorization.

764678990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76467906.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The square root of 764678990 is about 27652.8296924564. The cubic root of 764678990 is about 914.4494842072.

The spelling of 764678990 in words is "seven hundred sixty-four million, six hundred seventy-eight thousand, nine hundred ninety".