638793102 has 8 divisors (see below), whose sum is σ = 1277586216. Its totient is φ = 212931032.

The previous prime is 638793101. The next prime is 638793107. The reversal of 638793102 is 201397836.

It is a sphenic number, since it is the product of 3 distinct primes.

638793102 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638793101) 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, 53232753 + ... + 53232764.

It is an arithmetic number, because the mean of its divisors is an integer number (159698277).

Almost surely, 2^638793102 is an apocalyptic number.

638793102 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

638793102 is a wasteful number, since it uses less digits than its factorization.

638793102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106465522.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 638793102 is about 25274.3566090217. The cubic root of 638793102 is about 861.2318303692.

The spelling of 638793102 in words is "six hundred thirty-eight million, seven hundred ninety-three thousand, one hundred two".