120990400 has 42 divisors (see below), whose sum is σ = 297715940. Its totient is φ = 48395520.

The previous prime is 120990391. The next prime is 120990413. The reversal of 120990400 is 4099021.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36210 + ... + 39409.

Almost surely, 2^120990400 is an apocalyptic number.

120990400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120990400 is an abundant number, since it is smaller than the sum of its proper divisors (176725540).

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

120990400 is an equidigital number, since it uses as much as digits as its factorization.

120990400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75641 (or 75626 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 120990400 is about 10999.5636277081. The cubic root of 120990400 is about 494.5956634171.

The spelling of 120990400 in words is "one hundred twenty million, nine hundred ninety thousand, four hundred".