639027552 has 144 divisors (see below), whose sum is σ = 1841882112. Its totient is φ = 193751040.

The previous prime is 639027533. The next prime is 639027593. The reversal of 639027552 is 255720936.

It is a super-2 number, since 2×639027552² = 816712424430225408, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 639027552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 859693 + ... + 860435.

It is an arithmetic number, because the mean of its divisors is an integer number (12790848).

Almost surely, 2^639027552 is an apocalyptic number.

639027552 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 639027552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (920941056).

639027552 is an abundant number, since it is smaller than the sum of its proper divisors (1202854560).

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

639027552 is a wasteful number, since it uses less digits than its factorization.

639027552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821 (or 796 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 39.

The square root of 639027552 is about 25278.9942837922. The cubic root of 639027552 is about 861.3371806538.

The spelling of 639027552 in words is "six hundred thirty-nine million, twenty-seven thousand, five hundred fifty-two".