120099978 has 24 divisors (see below), whose sum is σ = 261060228. Its totient is φ = 39903552.

The previous prime is 120099977. The next prime is 120100003. The reversal of 120099978 is 879990021.

It can be written as a sum of positive squares in 2 ways, for example, as 119968209 + 131769 = 10953^2 + 363^2 .

It is not an unprimeable number, because it can be changed into a prime (120099971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5025 + ... + 16292.

Almost surely, 2^120099978 is an apocalyptic number.

120099978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

120099978 is an abundant number, since it is smaller than the sum of its proper divisors (140960250).

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

120099978 is a wasteful number, since it uses less digits than its factorization.

120099978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21638 (or 21635 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 120099978 is about 10959.0135504981. The cubic root of 120099978 is about 493.3793584809.

The spelling of 120099978 in words is "one hundred twenty million, ninety-nine thousand, nine hundred seventy-eight".