764774320 has 80 divisors (see below), whose sum is σ = 1878495840. Its totient is φ = 288755712.

The previous prime is 764774251. The next prime is 764774327. The reversal of 764774320 is 23477467.

764774320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (764774327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 511494 + ... + 512986.

It is an arithmetic number, because the mean of its divisors is an integer number (23481198).

Almost surely, 2^764774320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 764774320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (939247920).

764774320 is an abundant number, since it is smaller than the sum of its proper divisors (1113721520).

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

764774320 is a wasteful number, since it uses less digits than its factorization.

764774320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862 (or 1856 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 40.

The square root of 764774320 is about 27654.5533321368. The cubic root of 764774320 is about 914.4874830922.

The spelling of 764774320 in words is "seven hundred sixty-four million, seven hundred seventy-four thousand, three hundred twenty".