764646220 has 24 divisors (see below), whose sum is σ = 1729277424. Its totient is φ = 282330816.

The previous prime is 764646209. The next prime is 764646251. The reversal of 764646220 is 22646467.

764646220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 764646220.

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, 1470214 + ... + 1470733.

It is an arithmetic number, because the mean of its divisors is an integer number (72053226).

Almost surely, 2^764646220 is an apocalyptic number.

It is an amenable number.

764646220 is an abundant number, since it is smaller than the sum of its proper divisors (964631204).

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

764646220 is a wasteful number, since it uses less digits than its factorization.

764646220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2940969 (or 2940967 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 37.

The square root of 764646220 is about 27652.2371608519. The cubic root of 764646220 is about 914.4364212365.

The spelling of 764646220 in words is "seven hundred sixty-four million, six hundred forty-six thousand, two hundred twenty".