639074352 has 40 divisors (see below), whose sum is σ = 1886791936. Its totient is φ = 182592576.

The previous prime is 639074273. The next prime is 639074357. The reversal of 639074352 is 253470936.

It is a self number, because there is not a number n which added to its sum of digits gives 639074352.

It is not an unprimeable number, because it can be changed into a prime (639074357) 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, 950668 + ... + 951339.

Almost surely, 2^639074352 is an apocalyptic number.

It is an amenable number.

639074352 is an abundant number, since it is smaller than the sum of its proper divisors (1247717584).

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

639074352 is a wasteful number, since it uses less digits than its factorization.

639074352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902025 (or 1902019 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 39.

The square root of 639074352 is about 25279.9199365821. The cubic root of 639074352 is about 861.3582071838.

The spelling of 639074352 in words is "six hundred thirty-nine million, seventy-four thousand, three hundred fifty-two".