123040404 has 24 divisors (see below), whose sum is σ = 318993920. Its totient is φ = 41013432.

The previous prime is 123040403. The next prime is 123040427. The reversal of 123040404 is 404040321.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123040403) 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, 569524 + ... + 569739.

Almost surely, 2^123040404 is an apocalyptic number.

It is an amenable number.

123040404 is an abundant number, since it is smaller than the sum of its proper divisors (195953516).

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

123040404 is a wasteful number, since it uses less digits than its factorization.

123040404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139276 (or 1139268 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 123040404 is about 11092.3579098405. The cubic root of 123040404 is about 497.3734317725.

Adding to 123040404 its reverse (404040321), we get a palindrome (527080725).

The spelling of 123040404 in words is "one hundred twenty-three million, forty thousand, four hundred four".