638680302 has 48 divisors (see below), whose sum is σ = 1545463920. Its totient is φ = 196515072.

The previous prime is 638680297. The next prime is 638680337. The reversal of 638680302 is 203086836.

It is a super-2 number, since 2×638680302² = 815825056325622408, which contains 22 as substring.

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, 44227 + ... + 56862.

It is an arithmetic number, because the mean of its divisors is an integer number (32197165).

Almost surely, 2^638680302 is an apocalyptic number.

638680302 is an abundant number, since it is smaller than the sum of its proper divisors (906783618).

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

638680302 is a wasteful number, since it uses less digits than its factorization.

638680302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101119 (or 101107 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 638680302 is about 25272.1249996909. The cubic root of 638680302 is about 861.1811344193.

The spelling of 638680302 in words is "six hundred thirty-eight million, six hundred eighty thousand, three hundred two".