638482360 has 64 divisors (see below), whose sum is σ = 1485702720. Its totient is φ = 246758400.

The previous prime is 638482349. The next prime is 638482391. The reversal of 638482360 is 63284836.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222052 + ... + 224908.

It is an arithmetic number, because the mean of its divisors is an integer number (23214105).

Almost surely, 2^638482360 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 638482360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (742851360).

638482360 is an abundant number, since it is smaller than the sum of its proper divisors (847220360).

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

638482360 is a wasteful number, since it uses less digits than its factorization.

638482360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3056 (or 3052 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 638482360 is about 25268.2084841803. The cubic root of 638482360 is about 861.0921584852.

The spelling of 638482360 in words is "six hundred thirty-eight million, four hundred eighty-two thousand, three hundred sixty".