638524212 has 48 divisors (see below), whose sum is σ = 1508310720. Its totient is φ = 210222592.

The previous prime is 638524193. The next prime is 638524213. The reversal of 638524212 is 212425836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638524213) 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, 653068 + ... + 654044.

It is an arithmetic number, because the mean of its divisors is an integer number (31423140).

Almost surely, 2^638524212 is an apocalyptic number.

It is an amenable number.

638524212 is an abundant number, since it is smaller than the sum of its proper divisors (869786508).

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

638524212 is a wasteful number, since it uses less digits than its factorization.

638524212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600 (or 1598 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 638524212 is about 25269.0366258787. The cubic root of 638524212 is about 861.1109727046.

The spelling of 638524212 in words is "six hundred thirty-eight million, five hundred twenty-four thousand, two hundred twelve".