764421056 has 56 divisors (see below), whose sum is σ = 1775923296. Its totient is φ = 319610880.

The previous prime is 764421037. The next prime is 764421061. The reversal of 764421056 is 650124467.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2441 + ... + 39176.

It is an arithmetic number, because the mean of its divisors is an integer number (31712916).

Almost surely, 2^764421056 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 764421056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (887961648).

764421056 is an abundant number, since it is smaller than the sum of its proper divisors (1011502240).

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

764421056 is a wasteful number, since it uses less digits than its factorization.

764421056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41677 (or 41667 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 764421056 is about 27648.1655087639. The cubic root of 764421056 is about 914.3466549410.

The spelling of 764421056 in words is "seven hundred sixty-four million, four hundred twenty-one thousand, fifty-six".