123943680 has 432 divisors, whose sum is σ = 516559680. Its totient is φ = 26836992.

The previous prime is 123943679. The next prime is 123943681. The reversal of 123943680 is 86349321.

It is an interprime number because it is at equal distance from previous prime (123943679) and next prime (123943681).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (123943681) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2338534 + ... + 2338586.

It is an arithmetic number, because the mean of its divisors is an integer number (1195740).

Almost surely, 2^123943680 is an apocalyptic number.

123943680 is a gapful number since it is divisible by the number (10) 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 123943680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258279840).

123943680 is an abundant number, since it is smaller than the sum of its proper divisors (392616000).

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

123943680 is a wasteful number, since it uses less digits than its factorization.

123943680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 123943680 is about 11132.9995957963. Note that the first 3 decimals coincide. The cubic root of 123943680 is about 498.5875872707.

The spelling of 123943680 in words is "one hundred twenty-three million, nine hundred forty-three thousand, six hundred eighty".