638330124 has 48 divisors (see below), whose sum is σ = 1524096000. Its totient is φ = 207843456.

The previous prime is 638330123. The next prime is 638330149. The reversal of 638330124 is 421033836.

It is a junction number, because it is equal to n+sod(n) for n = 638330091 and 638330100.

It is not an unprimeable number, because it can be changed into a prime (638330123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 455577 + ... + 456975.

It is an arithmetic number, because the mean of its divisors is an integer number (31752000).

Almost surely, 2^638330124 is an apocalyptic number.

It is an amenable number.

638330124 is an abundant number, since it is smaller than the sum of its proper divisors (885765876).

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

638330124 is a wasteful number, since it uses less digits than its factorization.

638330124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2262 (or 2260 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 638330124 is about 25265.1959026642. The cubic root of 638330124 is about 861.0237151190.

The spelling of 638330124 in words is "six hundred thirty-eight million, three hundred thirty thousand, one hundred twenty-four".