123585856 has 28 divisors (see below), whose sum is σ = 247546368. Its totient is φ = 61212032.

The previous prime is 123585853. The next prime is 123585887. The reversal of 123585856 is 658585321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123585853) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2176 + ... + 15871.

Almost surely, 2^123585856 is an apocalyptic number.

123585856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123585856 is an abundant number, since it is smaller than the sum of its proper divisors (123960512).

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

123585856 is a wasteful number, since it uses less digits than its factorization.

123585856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18166 (or 18156 counting only the distinct ones).

The product of its digits is 288000, while the sum is 43.

The square root of 123585856 is about 11116.9175583882. The cubic root of 123585856 is about 498.1073192257.

The spelling of 123585856 in words is "one hundred twenty-three million, five hundred eighty-five thousand, eight hundred fifty-six".