123923904 has 112 divisors (see below), whose sum is σ = 356737920. Its totient is φ = 37739520.

The previous prime is 123923881. The next prime is 123923923. The reversal of 123923904 is 409329321.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

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, 326787 + ... + 327165.

It is an arithmetic number, because the mean of its divisors is an integer number (3185160).

Almost surely, 2^123923904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123923904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178368960).

123923904 is an abundant number, since it is smaller than the sum of its proper divisors (232814016).

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

123923904 is a wasteful number, since it uses less digits than its factorization.

123923904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538 (or 528 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 123923904 is about 11132.1113900284. Note that the first 3 decimals coincide. The cubic root of 123923904 is about 498.5610682567.

The spelling of 123923904 in words is "one hundred twenty-three million, nine hundred twenty-three thousand, nine hundred four".