638008326 has 40 divisors (see below), whose sum is σ = 1432880064. Its totient is φ = 212183280.

The previous prime is 638008313. The next prime is 638008363. The reversal of 638008326 is 623800836.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 70411 + ... + 78953.

Almost surely, 2^638008326 is an apocalyptic number.

638008326 is an abundant number, since it is smaller than the sum of its proper divisors (794871738).

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

638008326 is a wasteful number, since it uses less digits than its factorization.

638008326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9018 (or 9009 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 638008326 is about 25258.8266948408. The cubic root of 638008326 is about 860.8790030167.

The spelling of 638008326 in words is "six hundred thirty-eight million, eight thousand, three hundred twenty-six".