123405304 has 64 divisors (see below), whose sum is σ = 277344000. Its totient is φ = 50814720.

The previous prime is 123405299. The next prime is 123405311. The reversal of 123405304 is 403504321.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 36852 + ... + 40060.

It is an arithmetic number, because the mean of its divisors is an integer number (4333500).

Almost surely, 2^123405304 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 123405304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138672000).

123405304 is an abundant number, since it is smaller than the sum of its proper divisors (153938696).

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

123405304 is a wasteful number, since it uses less digits than its factorization.

123405304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3268 (or 3264 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 123405304 is about 11108.7939939491. The cubic root of 123405304 is about 497.8646320566.

Adding to 123405304 its reverse (403504321), we get a palindrome (526909625).

The spelling of 123405304 in words is "one hundred twenty-three million, four hundred five thousand, three hundred four".