123863856 has 20 divisors (see below), whose sum is σ = 319981752. Its totient is φ = 41287936.

The previous prime is 123863851. The next prime is 123863867. The reversal of 123863856 is 658368321.

It is not an unprimeable number, because it can be changed into a prime (123863851) 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, 1290201 + ... + 1290296.

Almost surely, 2^123863856 is an apocalyptic number.

123863856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123863856 is an abundant number, since it is smaller than the sum of its proper divisors (196117896).

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

123863856 is a wasteful number, since it uses less digits than its factorization.

123863856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2580508 (or 2580502 counting only the distinct ones).

The product of its digits is 207360, while the sum is 42.

The square root of 123863856 is about 11129.4140007460. The cubic root of 123863856 is about 498.4805284231.

The spelling of 123863856 in words is "one hundred twenty-three million, eight hundred sixty-three thousand, eight hundred fifty-six".