120492390 has 32 divisors (see below), whose sum is σ = 299155680. Its totient is φ = 31023104.

The previous prime is 120492367. The next prime is 120492391. The reversal of 120492390 is 93294021.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120492391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68379 + ... + 70118.

It is an arithmetic number, because the mean of its divisors is an integer number (9348615).

Almost surely, 2^120492390 is an apocalyptic number.

120492390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

120492390 is an abundant number, since it is smaller than the sum of its proper divisors (178663290).

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

120492390 is a wasteful number, since it uses less digits than its factorization.

120492390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138536.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 120492390 is about 10976.9025685755. The cubic root of 120492390 is about 493.9161265484.

The spelling of 120492390 in words is "one hundred twenty million, four hundred ninety-two thousand, three hundred ninety".