120899520 has 224 divisors, whose sum is σ = 487680000. Its totient is φ = 27620352.

The previous prime is 120899479. The next prime is 120899549. The reversal of 120899520 is 25998021.

120899520 is a `hidden beast` number, since 120 + 8 + 9 + 9 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (224).

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59481 + ... + 61479.

Almost surely, 2^120899520 is an apocalyptic number.

120899520 is a gapful number since it is divisible by the number (10) 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 120899520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243840000).

120899520 is an abundant number, since it is smaller than the sum of its proper divisors (366780480).

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

120899520 is a wasteful number, since it uses less digits than its factorization.

120899520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2032 (or 2016 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 120899520 is about 10995.4317786979. The cubic root of 120899520 is about 494.4717965296.

It can be divided in two parts, 12089 and 9520, that added together give a square (21609 = 147²).

The spelling of 120899520 in words is "one hundred twenty million, eight hundred ninety-nine thousand, five hundred twenty".