764373638 has 12 divisors (see below), whose sum is σ = 1333754172. Its totient is φ = 327588660.

The previous prime is 764373637. The next prime is 764373641. The reversal of 764373638 is 836373467.

It is a junction number, because it is equal to n+sod(n) for n = 764373592 and 764373601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764373637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3899768 + ... + 3899963.

It is an arithmetic number, because the mean of its divisors is an integer number (111146181).

Almost surely, 2^764373638 is an apocalyptic number.

764373638 is a deficient number, since it is larger than the sum of its proper divisors (569380534).

764373638 is a wasteful number, since it uses less digits than its factorization.

764373638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7799747 (or 7799740 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 47.

The square root of 764373638 is about 27647.3079702166. The cubic root of 764373638 is about 914.3277485255.

The spelling of 764373638 in words is "seven hundred sixty-four million, three hundred seventy-three thousand, six hundred thirty-eight".