120015920 has 120 divisors (see below), whose sum is σ = 308350800. Its totient is φ = 43380736.

The previous prime is 120015919. The next prime is 120015941. The reversal of 120015920 is 29510021.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 120015892 and 120015901.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 670391 + ... + 670569.

It is an arithmetic number, because the mean of its divisors is an integer number (2569590).

Almost surely, 2^120015920 is an apocalyptic number.

120015920 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 120015920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154175400).

120015920 is an abundant number, since it is smaller than the sum of its proper divisors (188334880).

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

120015920 is a wasteful number, since it uses less digits than its factorization.

120015920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 120015920 is about 10955.1777712641. The cubic root of 120015920 is about 493.2642261773.

Adding to 120015920 its reverse (29510021), we get a palindrome (149525941).

The spelling of 120015920 in words is "one hundred twenty million, fifteen thousand, nine hundred twenty".