764544838 has 16 divisors (see below), whose sum is σ = 1239804720. Its totient is φ = 352364256.

The previous prime is 764544829. The next prime is 764544881. The reversal of 764544838 is 838445467.

It is a junction number, because it is equal to n+sod(n) for n = 764544791 and 764544800.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 270481 + ... + 273292.

It is an arithmetic number, because the mean of its divisors is an integer number (77487795).

Almost surely, 2^764544838 is an apocalyptic number.

764544838 is a deficient number, since it is larger than the sum of its proper divisors (475259882).

764544838 is a wasteful number, since it uses less digits than its factorization.

764544838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543831.

The product of its digits is 2580480, while the sum is 49.

The square root of 764544838 is about 27650.4039391832. The cubic root of 764544838 is about 914.3960053822.

The spelling of 764544838 in words is "seven hundred sixty-four million, five hundred forty-four thousand, eight hundred thirty-eight".