123508656 has 60 divisors (see below), whose sum is σ = 352196208. Its totient is φ = 40390272.

The previous prime is 123508601. The next prime is 123508669. The reversal of 123508656 is 656805321.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 123508656.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 460 + ... + 15723.

Almost surely, 2^123508656 is an apocalyptic number.

123508656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123508656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176098104).

123508656 is an abundant number, since it is smaller than the sum of its proper divisors (228687552).

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

123508656 is a wasteful number, since it uses less digits than its factorization.

123508656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16250 (or 16241 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 123508656 is about 11113.4448304745. Note that the first 3 decimals coincide. The cubic root of 123508656 is about 498.0035805617.

The spelling of 123508656 in words is "one hundred twenty-three million, five hundred eight thousand, six hundred fifty-six".