120656690 has 64 divisors (see below), whose sum is σ = 274710528. Its totient is φ = 37060800.

The previous prime is 120656671. The next prime is 120656699. The reversal of 120656690 is 96656021.

It is a happy number.

It is a super-2 number, since 2×120656690² = 29116073683512200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 120656690.

It is not an unprimeable number, because it can be changed into a prime (120656699) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53567 + ... + 55773.

It is an arithmetic number, because the mean of its divisors is an integer number (4292352).

Almost surely, 2^120656690 is an apocalyptic number.

120656690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

120656690 is an abundant number, since it is smaller than the sum of its proper divisors (154053838).

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

120656690 is a wasteful number, since it uses less digits than its factorization.

120656690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2303.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 120656690 is about 10984.3839153591. The cubic root of 120656690 is about 494.1405212528.

The spelling of 120656690 in words is "one hundred twenty million, six hundred fifty-six thousand, six hundred ninety".