123704920 has 32 divisors (see below), whose sum is σ = 294710400. Its totient is φ = 46571008.

The previous prime is 123704909. The next prime is 123704929. The reversal of 123704920 is 29407321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123704929) 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, 90280 + ... + 91639.

It is an arithmetic number, because the mean of its divisors is an integer number (9209700).

Almost surely, 2^123704920 is an apocalyptic number.

123704920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123704920 is an abundant number, since it is smaller than the sum of its proper divisors (171005480).

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

123704920 is a wasteful number, since it uses less digits than its factorization.

123704920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181947 (or 181943 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 123704920 is about 11122.2713507628. The cubic root of 123704920 is about 498.2672286101.

The spelling of 123704920 in words is "one hundred twenty-three million, seven hundred four thousand, nine hundred twenty".