12403880 has 96 divisors (see below), whose sum is σ = 31498200. Its totient is φ = 4386816.

The previous prime is 12403879. The next prime is 12403883. The reversal of 12403880 is 8830421.

It can be written as a sum of positive squares in 12 ways, for example, as 7086244 + 5317636 = 2662^2 + 2306^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12403883) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 335222 + ... + 335258.

Almost surely, 2^12403880 is an apocalyptic number.

12403880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12403880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15749100).

12403880 is an abundant number, since it is smaller than the sum of its proper divisors (19094320).

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

12403880 is a wasteful number, since it uses less digits than its factorization.

12403880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 12403880 is about 3521.9142522214. The cubic root of 12403880 is about 231.4830443478.

The spelling of 12403880 in words is "twelve million, four hundred three thousand, eight hundred eighty".