123204040 has 32 divisors (see below), whose sum is σ = 279216000. Its totient is φ = 48924864.

The previous prime is 123204019. The next prime is 123204041. The reversal of 123204040 is 40402321.

It is not an unprimeable number, because it can be changed into a prime (123204041) 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, 5520 + ... + 16639.

It is an arithmetic number, because the mean of its divisors is an integer number (8725500).

Almost surely, 2^123204040 is an apocalyptic number.

123204040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123204040 is an abundant number, since it is smaller than the sum of its proper divisors (156011960).

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

123204040 is a wasteful number, since it uses less digits than its factorization.

123204040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22309 (or 22305 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 123204040 is about 11099.7315282848. The cubic root of 123204040 is about 497.5938258936.

Adding to 123204040 its reverse (40402321), we get a palindrome (163606361).

The spelling of 123204040 in words is "one hundred twenty-three million, two hundred four thousand, forty".