638083550 has 48 divisors (see below), whose sum is σ = 1284813600. Its totient is φ = 234368640.

The previous prime is 638083547. The next prime is 638083573. The reversal of 638083550 is 55380836.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126884 + ... + 131816.

It is an arithmetic number, because the mean of its divisors is an integer number (26766950).

Almost surely, 2^638083550 is an apocalyptic number.

638083550 is an abundant number, since it is smaller than the sum of its proper divisors (646730050).

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

638083550 is a wasteful number, since it uses less digits than its factorization.

638083550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5157 (or 5152 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 638083550 is about 25260.3157145749. The cubic root of 638083550 is about 860.9128354995.

The spelling of 638083550 in words is "six hundred thirty-eight million, eighty-three thousand, five hundred fifty".