123631856 has 20 divisors (see below), whose sum is σ = 241149000. Its totient is φ = 61399872.

The previous prime is 123631853. The next prime is 123631889. The reversal of 123631856 is 658136321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123631853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23546 + ... + 28313.

It is an arithmetic number, because the mean of its divisors is an integer number (12057450).

Almost surely, 2^123631856 is an apocalyptic number.

123631856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123631856 is a deficient number, since it is larger than the sum of its proper divisors (117517144).

123631856 is a wasteful number, since it uses less digits than its factorization.

123631856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52016 (or 52010 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 123631856 is about 11118.9862847294. The cubic root of 123631856 is about 498.1691118806.

The spelling of 123631856 in words is "one hundred twenty-three million, six hundred thirty-one thousand, eight hundred fifty-six".