120139990 has 16 divisors (see below), whose sum is σ = 220853952. Its totient is φ = 47033344.

The previous prime is 120139949. The next prime is 120139993. The reversal of 120139990 is 99931021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120139993) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 127339 + ... + 128278.

It is an arithmetic number, because the mean of its divisors is an integer number (13803372).

Almost surely, 2^120139990 is an apocalyptic number.

120139990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

120139990 is a deficient number, since it is larger than the sum of its proper divisors (100713962).

120139990 is a wasteful number, since it uses less digits than its factorization.

120139990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255671.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 120139990 is about 10960.8389277464. The cubic root of 120139990 is about 493.4341431232.

The spelling of 120139990 in words is "one hundred twenty million, one hundred thirty-nine thousand, nine hundred ninety".