123576856 has 64 divisors (see below), whose sum is σ = 257040000. Its totient is φ = 55680768.

The previous prime is 123576853. The next prime is 123576919. The reversal of 123576856 is 658675321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123576853) 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 15 ways as a sum of consecutive naturals, for example, 1388460 + ... + 1388548.

It is an arithmetic number, because the mean of its divisors is an integer number (4016250).

Almost surely, 2^123576856 is an apocalyptic number.

123576856 is the 7031-st heptagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123576856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128520000).

123576856 is an abundant number, since it is smaller than the sum of its proper divisors (133463144).

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

123576856 is an equidigital number, since it uses as much as digits as its factorization.

123576856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 183 counting only the distinct ones).

The product of its digits is 302400, while the sum is 43.

The square root of 123576856 is about 11116.5127625528. The cubic root of 123576856 is about 498.0952275650.

The spelling of 123576856 in words is "one hundred twenty-three million, five hundred seventy-six thousand, eight hundred fifty-six".