639482458 has 8 divisors (see below), whose sum is σ = 961450560. Its totient is φ = 318998940.

The previous prime is 639482443. The next prime is 639482479. The reversal of 639482458 is 854284936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370068 + ... + 371791.

It is an arithmetic number, because the mean of its divisors is an integer number (120181320).

Almost surely, 2^639482458 is an apocalyptic number.

639482458 is a deficient number, since it is larger than the sum of its proper divisors (321968102).

639482458 is a wasteful number, since it uses less digits than its factorization.

639482458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742292.

The product of its digits is 1658880, while the sum is 49.

The square root of 639482458 is about 25287.9903906973. The cubic root of 639482458 is about 861.5415195278.

The spelling of 639482458 in words is "six hundred thirty-nine million, four hundred eighty-two thousand, four hundred fifty-eight".