764143228 has 12 divisors (see below), whose sum is σ = 1342847520. Its totient is φ = 380472512.

The previous prime is 764143223. The next prime is 764143297. The reversal of 764143228 is 822341467.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764143223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398701 + ... + 400612.

It is an arithmetic number, because the mean of its divisors is an integer number (111903960).

Almost surely, 2^764143228 is an apocalyptic number.

It is an amenable number.

764143228 is a deficient number, since it is larger than the sum of its proper divisors (578704292).

764143228 is a wasteful number, since it uses less digits than its factorization.

764143228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799556 (or 799554 counting only the distinct ones).

The product of its digits is 64512, while the sum is 37.

The square root of 764143228 is about 27643.1407043411. The cubic root of 764143228 is about 914.2358687530.

The spelling of 764143228 in words is "seven hundred sixty-four million, one hundred forty-three thousand, two hundred twenty-eight".