638800348 has 48 divisors (see below), whose sum is σ = 1161216000. Its totient is φ = 307359360.

The previous prime is 638800333. The next prime is 638800363. The reversal of 638800348 is 843008836.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (638800333) and next prime (638800363).

It is a super-2 number, since 2×638800348² = 816131769209842208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 638800348.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3209953 + ... + 3210151.

It is an arithmetic number, because the mean of its divisors is an integer number (24192000).

Almost surely, 2^638800348 is an apocalyptic number.

It is an amenable number.

638800348 is a deficient number, since it is larger than the sum of its proper divisors (522415652).

638800348 is a wasteful number, since it uses less digits than its factorization.

638800348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 638800348 is about 25274.4999554887. The cubic root of 638800348 is about 861.2350867508.

The spelling of 638800348 in words is "six hundred thirty-eight million, eight hundred thousand, three hundred forty-eight".