638299359 has 10 divisors (see below), whose sum is σ = 953509040. Its totient is φ = 425532852.

The previous prime is 638299297. The next prime is 638299397. The reversal of 638299359 is 953992836.

It is not a de Polignac number, because 638299359 - 2¹⁵ = 638266591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638229359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3940039 + ... + 3940200.

It is an arithmetic number, because the mean of its divisors is an integer number (95350904).

Almost surely, 2^638299359 is an apocalyptic number.

638299359 is a deficient number, since it is larger than the sum of its proper divisors (315209681).

638299359 is an equidigital number, since it uses as much as digits as its factorization.

638299359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7880251 (or 7880242 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 54.

The square root of 638299359 is about 25264.5870538190. The cubic root of 638299359 is about 861.0098822452.

The spelling of 638299359 in words is "six hundred thirty-eight million, two hundred ninety-nine thousand, three hundred fifty-nine".