123998256 has 80 divisors (see below), whose sum is σ = 374678400. Its totient is φ = 39154752.

The previous prime is 123998249. The next prime is 123998257. The reversal of 123998256 is 652899321.

123998256 is a `hidden beast` number, since 1 + 2 + 399 + 8 + 256 = 666.

It is not an unprimeable number, because it can be changed into a prime (123998257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 655 + ... + 15761.

It is an arithmetic number, because the mean of its divisors is an integer number (4683480).

Almost surely, 2^123998256 is an apocalyptic number.

123998256 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 123998256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187339200).

123998256 is an abundant number, since it is smaller than the sum of its proper divisors (250680144).

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

123998256 is a wasteful number, since it uses less digits than its factorization.

123998256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15143 (or 15131 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 123998256 is about 11135.4504174730. The cubic root of 123998256 is about 498.6607573945.

The spelling of 123998256 in words is "one hundred twenty-three million, nine hundred ninety-eight thousand, two hundred fifty-six".