638592052 has 24 divisors (see below), whose sum is σ = 1344405440. Its totient is φ = 259277760.

The previous prime is 638592049. The next prime is 638592061. The reversal of 638592052 is 250295836.

It is a super-3 number, since 3×638592052³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 638591996 and 638592014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 599649 + ... + 600712.

Almost surely, 2^638592052 is an apocalyptic number.

It is an amenable number.

638592052 is an abundant number, since it is smaller than the sum of its proper divisors (705813388).

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

638592052 is a wasteful number, since it uses less digits than its factorization.

638592052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200391 (or 1200389 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 638592052 is about 25270.3789445271. The cubic root of 638592052 is about 861.1414678676.

The spelling of 638592052 in words is "six hundred thirty-eight million, five hundred ninety-two thousand, fifty-two".