123918156 has 18 divisors (see below), whose sum is σ = 313237652. Its totient is φ = 41306040.

The previous prime is 123918139. The next prime is 123918169. The reversal of 123918156 is 651819321.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 3442171 = 123918156 / (1 + 2 + 3 + 9 + 1 + 8 + 1 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 123918156.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1721050 + ... + 1721121.

Almost surely, 2^123918156 is an apocalyptic number.

It is an amenable number.

123918156 is an abundant number, since it is smaller than the sum of its proper divisors (189319496).

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

123918156 is a wasteful number, since it uses less digits than its factorization.

123918156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3442181 (or 3442176 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 123918156 is about 11131.8532149863. The cubic root of 123918156 is about 498.5533598344.

The spelling of 123918156 in words is "one hundred twenty-three million, nine hundred eighteen thousand, one hundred fifty-six".