638204016 has 40 divisors (see below), whose sum is σ = 1649675664. Its totient is φ = 212608000.

The previous prime is 638203981. The next prime is 638204029. The reversal of 638204016 is 610402836.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113266 + ... + 118766.

Almost surely, 2^638204016 is an apocalyptic number.

It is an amenable number.

638204016 is an abundant number, since it is smaller than the sum of its proper divisors (1011471648).

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

638204016 is a wasteful number, since it uses less digits than its factorization.

638204016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7929 (or 7923 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 638204016 is about 25262.7000932204. The cubic root of 638204016 is about 860.9670103275.

The spelling of 638204016 in words is "six hundred thirty-eight million, two hundred four thousand, sixteen".