639848160 has 288 divisors, whose sum is σ = 2588931072. Its totient is φ = 146188800.

The previous prime is 639848113. The next prime is 639848233. The reversal of 639848160 is 61848936.

639848160 is a `hidden beast` number, since 639 + 8 + 4 + 8 + 1 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (45).

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 47 ways as a sum of consecutive naturals, for example, 270985 + ... + 273335.

It is an arithmetic number, because the mean of its divisors is an integer number (8989344).

Almost surely, 2^639848160 is an apocalyptic number.

639848160 is a gapful number since it is divisible by the number (60) 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 639848160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1294465536).

639848160 is an abundant number, since it is smaller than the sum of its proper divisors (1949082912).

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

639848160 is a wasteful number, since it uses less digits than its factorization.

639848160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388 (or 2368 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 639848160 is about 25295.2201018295. The cubic root of 639848160 is about 861.7057186717.

The spelling of 639848160 in words is "six hundred thirty-nine million, eight hundred forty-eight thousand, one hundred sixty".