764434881 has 16 divisors (see below), whose sum is σ = 1294281600. Its totient is φ = 436819824.

The previous prime is 764434861. The next prime is 764434883. The reversal of 764434881 is 188434467.

It is not a de Polignac number, because 764434881 - 2⁵ = 764434849 is a prime.

It is a super-2 number, since 2×764434881² = 1168721374578968322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (764434883) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2022126 + ... + 2022503.

It is an arithmetic number, because the mean of its divisors is an integer number (80892600).

Almost surely, 2^764434881 is an apocalyptic number.

It is an amenable number.

764434881 is a deficient number, since it is larger than the sum of its proper divisors (529846719).

764434881 is a wasteful number, since it uses less digits than its factorization.

764434881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4044645 (or 4044639 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The square root of 764434881 is about 27648.4155242213. The cubic root of 764434881 is about 914.3521670717.

The spelling of 764434881 in words is "seven hundred sixty-four million, four hundred thirty-four thousand, eight hundred eighty-one".