123404456 has 32 divisors (see below), whose sum is σ = 268069440. Its totient is φ = 52161408.

The previous prime is 123404441. The next prime is 123404497. The reversal of 123404456 is 654404321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11006 + ... + 19181.

It is an arithmetic number, because the mean of its divisors is an integer number (8377170).

Almost surely, 2^123404456 is an apocalyptic number.

It is an amenable number.

123404456 is an abundant number, since it is smaller than the sum of its proper divisors (144664984).

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

123404456 is a wasteful number, since it uses less digits than its factorization.

123404456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30273 (or 30269 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 123404456 is about 11108.7558259240. The cubic root of 123404456 is about 497.8634916676.

Adding to 123404456 its reverse (654404321), we get a palindrome (777808777).

The spelling of 123404456 in words is "one hundred twenty-three million, four hundred four thousand, four hundred fifty-six".