123090988 has 12 divisors (see below), whose sum is σ = 215504632. Its totient is φ = 61518240.

The previous prime is 123090967. The next prime is 123091019. The reversal of 123090988 is 889090321.

It is a super-2 number, since 2×123090988² = 30302782653632288, which contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 123090988.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6043 + ... + 16813.

Almost surely, 2^123090988 is an apocalyptic number.

It is an amenable number.

123090988 is a deficient number, since it is larger than the sum of its proper divisors (92413644).

123090988 is a wasteful number, since it uses less digits than its factorization.

123090988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13632 (or 13630 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 123090988 is about 11094.6378039123. The cubic root of 123090988 is about 497.4415819894.

The spelling of 123090988 in words is "one hundred twenty-three million, ninety thousand, nine hundred eighty-eight".