123426720 has 96 divisors (see below), whose sum is σ = 432008640. Its totient is φ = 32912640.

The previous prime is 123426707. The next prime is 123426731. The reversal of 123426720 is 27624321.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9966 + ... + 18605.

It is an arithmetic number, because the mean of its divisors is an integer number (4500090).

Almost surely, 2^123426720 is an apocalyptic number.

123426720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123426720 is an abundant number, since it is smaller than the sum of its proper divisors (308581920).

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

123426720 is a wasteful number, since it uses less digits than its factorization.

123426720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28595 (or 28581 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 123426720 is about 11109.7578731492. The cubic root of 123426720 is about 497.8934305277.

The spelling of 123426720 in words is "one hundred twenty-three million, four hundred twenty-six thousand, seven hundred twenty".