123836868 has 18 divisors (see below), whose sum is σ = 313032174. Its totient is φ = 41278944.

The previous prime is 123836833. The next prime is 123836897. The reversal of 123836868 is 868638321.

It can be written as a sum of positive squares in only one way, i.e., 122279364 + 1557504 = 11058^2 + 1248^2 .

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

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 5 ways as a sum of consecutive naturals, for example, 1719921 + ... + 1719992.

Almost surely, 2^123836868 is an apocalyptic number.

123836868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

123836868 is an abundant number, since it is smaller than the sum of its proper divisors (189195306).

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

123836868 is a wasteful number, since it uses less digits than its factorization.

123836868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3439923 (or 3439918 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 123836868 is about 11128.2014719361. The cubic root of 123836868 is about 498.4443220857. Note that the first 3 decimals are identical.

The spelling of 123836868 in words is "one hundred twenty-three million, eight hundred thirty-six thousand, eight hundred sixty-eight".