639054552 has 32 divisors (see below), whose sum is σ = 1600159680. Its totient is φ = 212681760.

The previous prime is 639054511. The next prime is 639054557. The reversal of 639054552 is 255450936.

It is a self number, because there is not a number n which added to its sum of digits gives 639054552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639054557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5274 + ... + 36137.

It is an arithmetic number, because the mean of its divisors is an integer number (50004990).

Almost surely, 2^639054552 is an apocalyptic number.

It is an amenable number.

639054552 is an abundant number, since it is smaller than the sum of its proper divisors (961105128).

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

639054552 is a wasteful number, since it uses less digits than its factorization.

639054552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42063 (or 42059 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 39.

The square root of 639054552 is about 25279.5283183844. The cubic root of 639054552 is about 861.3493114695.

The spelling of 639054552 in words is "six hundred thirty-nine million, fifty-four thousand, five hundred fifty-two".