120163638 has 64 divisors (see below), whose sum is σ = 301731840. Its totient is φ = 31106592.

The previous prime is 120163627. The next prime is 120163651. The reversal of 120163638 is 836361021.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15081 + ... + 21627.

It is an arithmetic number, because the mean of its divisors is an integer number (4714560).

Almost surely, 2^120163638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 120163638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150865920).

120163638 is an abundant number, since it is smaller than the sum of its proper divisors (181568202).

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

120163638 is a wasteful number, since it uses less digits than its factorization.

120163638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6601.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 120163638 is about 10961.9176242116. The cubic root of 120163638 is about 493.4665163713.

The spelling of 120163638 in words is "one hundred twenty million, one hundred sixty-three thousand, six hundred thirty-eight".