639074304 has 192 divisors, whose sum is σ = 2024245080. Its totient is φ = 192675840.

The previous prime is 639074273. The next prime is 639074357. The reversal of 639074304 is 403470936.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3243934 + ... + 3244130.

Almost surely, 2^639074304 is an apocalyptic number.

639074304 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 639074304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1012122540).

639074304 is an abundant number, since it is smaller than the sum of its proper divisors (1385170776).

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

639074304 is a wasteful number, since it uses less digits than its factorization.

639074304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The square root of 639074304 is about 25279.9189872120. The cubic root of 639074304 is about 861.3581856187.

The spelling of 639074304 in words is "six hundred thirty-nine million, seventy-four thousand, three hundred four".