123655400 has 48 divisors (see below), whose sum is σ = 313640640. Its totient is φ = 44964800.

The previous prime is 123655397. The next prime is 123655417. The reversal of 123655400 is 4556321.

It is a self number, because there is not a number n which added to its sum of digits gives 123655400.

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, 25904 + ... + 30303.

It is an arithmetic number, because the mean of its divisors is an integer number (6534180).

Almost surely, 2^123655400 is an apocalyptic number.

123655400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123655400 is an abundant number, since it is smaller than the sum of its proper divisors (189985240).

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

123655400 is a wasteful number, since it uses less digits than its factorization.

123655400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56234 (or 56225 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 123655400 is about 11120.0449639379. The cubic root of 123655400 is about 498.2007330433.

The spelling of 123655400 in words is "one hundred twenty-three million, six hundred fifty-five thousand, four hundred".