638374592 has 56 divisors (see below), whose sum is σ = 1304952432. Its totient is φ = 309657600.

The previous prime is 638374553. The next prime is 638374609. The reversal of 638374592 is 295473836.

It is a happy number.

It is a super-2 number, since 2×638374592² = 815044239422332928, which contains 22 as substring.

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, 553088 + ... + 554240.

It is an arithmetic number, because the mean of its divisors is an integer number (23302722).

Almost surely, 2^638374592 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 638374592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (652476216).

638374592 is an abundant number, since it is smaller than the sum of its proper divisors (666577840).

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

638374592 is a wasteful number, since it uses less digits than its factorization.

638374592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1417 (or 1407 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 47.

The square root of 638374592 is about 25266.0759121792. The cubic root of 638374592 is about 861.0437084903.

The spelling of 638374592 in words is "six hundred thirty-eight million, three hundred seventy-four thousand, five hundred ninety-two".