764455220 has 12 divisors (see below), whose sum is σ = 1605356004. Its totient is φ = 305782080.

The previous prime is 764455217. The next prime is 764455309. The reversal of 764455220 is 22554467.

It can be written as a sum of positive squares in 2 ways, for example, as 120209296 + 644245924 = 10964^2 + 25382^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19111361 + ... + 19111400.

It is an arithmetic number, because the mean of its divisors is an integer number (133779667).

Almost surely, 2^764455220 is an apocalyptic number.

It is an amenable number.

764455220 is an abundant number, since it is smaller than the sum of its proper divisors (840900784).

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

764455220 is a wasteful number, since it uses less digits than its factorization.

764455220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38222770 (or 38222768 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 35.

The square root of 764455220 is about 27648.7833367040. The cubic root of 764455220 is about 914.3602762620.

The spelling of 764455220 in words is "seven hundred sixty-four million, four hundred fifty-five thousand, two hundred twenty".