638498050 has 12 divisors (see below), whose sum is σ = 1187606466. Its totient is φ = 255399200.

The previous prime is 638498039. The next prime is 638498071. The reversal of 638498050 is 50894836.

It can be written as a sum of positive squares in 3 ways, for example, as 574129521 + 64368529 = 23961^2 + 8023^2 .

It is a junction number, because it is equal to n+sod(n) for n = 638497988 and 638498006.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6384931 + ... + 6385030.

Almost surely, 2^638498050 is an apocalyptic number.

638498050 is a deficient number, since it is larger than the sum of its proper divisors (549108416).

638498050 is a wasteful number, since it uses less digits than its factorization.

638498050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12769973 (or 12769968 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 638498050 is about 25268.5189514542. The cubic root of 638498050 is about 861.0992118909.

The spelling of 638498050 in words is "six hundred thirty-eight million, four hundred ninety-eight thousand, fifty".