638100734 has 8 divisors (see below), whose sum is σ = 960965208. Its totient is φ = 317779000.

The previous prime is 638100733. The next prime is 638100737. The reversal of 638100734 is 437001836.

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

It is a self number, because there is not a number n which added to its sum of digits gives 638100734.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638100733) 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, 635057 + ... + 636060.

It is an arithmetic number, because the mean of its divisors is an integer number (120120651).

Almost surely, 2^638100734 is an apocalyptic number.

638100734 is a deficient number, since it is larger than the sum of its proper divisors (322864474).

638100734 is a wasteful number, since it uses less digits than its factorization.

638100734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271370.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 638100734 is about 25260.6558505515. The cubic root of 638100734 is about 860.9205637421.

The spelling of 638100734 in words is "six hundred thirty-eight million, one hundred thousand, seven hundred thirty-four".