12404840 has 48 divisors (see below), whose sum is σ = 32472900. Its totient is φ = 4252416.

The previous prime is 12404827. The next prime is 12404863. The reversal of 12404840 is 4840421.

It can be written as a sum of positive squares in 2 ways, for example, as 12348196 + 56644 = 3514^2 + 238^2 .

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 11 ways as a sum of consecutive naturals, for example, 1205 + ... + 5124.

Almost surely, 2^12404840 is an apocalyptic number.

12404840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12404840 is an abundant number, since it is smaller than the sum of its proper divisors (20068060).

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

12404840 is a wasteful number, since it uses less digits than its factorization.

12404840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6354 (or 6343 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 12404840 is about 3522.0505391036. The cubic root of 12404840 is about 231.4890160811.

The spelling of 12404840 in words is "twelve million, four hundred four thousand, eight hundred forty".