123831136 has 48 divisors (see below), whose sum is σ = 286424208. Its totient is φ = 51955200.

The previous prime is 123831107. The next prime is 123831167. The reversal of 123831136 is 631138321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8955 + ... + 18106.

It is an arithmetic number, because the mean of its divisors is an integer number (5967171).

Almost surely, 2^123831136 is an apocalyptic number.

123831136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123831136 is an abundant number, since it is smaller than the sum of its proper divisors (162593072).

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

123831136 is a wasteful number, since it uses less digits than its factorization.

123831136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27095 (or 27087 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 123831136 is about 11127.9439250924. The cubic root of 123831136 is about 498.4366315194.

Adding to 123831136 its reverse (631138321), we get a palindrome (754969457).

The spelling of 123831136 in words is "one hundred twenty-three million, eight hundred thirty-one thousand, one hundred thirty-six".