638296496 has 20 divisors (see below), whose sum is σ = 1279345200. Its totient is φ = 308142912.

The previous prime is 638296489. The next prime is 638296513. The reversal of 638296496 is 694692836.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 687356 + ... + 688283.

It is an arithmetic number, because the mean of its divisors is an integer number (63967260).

Almost surely, 2^638296496 is an apocalyptic number.

It is an amenable number.

638296496 is an abundant number, since it is smaller than the sum of its proper divisors (641048704).

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

638296496 is a wasteful number, since it uses less digits than its factorization.

638296496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375676 (or 1375670 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 53.

The square root of 638296496 is about 25264.5303934192. The cubic root of 638296496 is about 861.0085949313.

The spelling of 638296496 in words is "six hundred thirty-eight million, two hundred ninety-six thousand, four hundred ninety-six".