123556880 has 40 divisors (see below), whose sum is σ = 291218712. Its totient is φ = 48743424.

The previous prime is 123556877. The next prime is 123556883. The reversal of 123556880 is 88655321.

It is an interprime number because it is at equal distance from previous prime (123556877) and next prime (123556883).

It can be written as a sum of positive squares in 4 ways, for example, as 258064 + 123298816 = 508^2 + 11104^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (123556883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4739 + ... + 16418.

Almost surely, 2^123556880 is an apocalyptic number.

123556880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123556880 is an abundant number, since it is smaller than the sum of its proper divisors (167661832).

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

123556880 is a wasteful number, since it uses less digits than its factorization.

123556880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21243 (or 21237 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 123556880 is about 11115.6142430367. The cubic root of 123556880 is about 498.0683873546.

The spelling of 123556880 in words is "one hundred twenty-three million, five hundred fifty-six thousand, eight hundred eighty".