12880440 has 96 divisors (see below), whose sum is σ = 43037280. Its totient is φ = 3338496.

The previous prime is 12880411. The next prime is 12880447. The reversal of 12880440 is 4408821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12880447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12837 + ... + 13803.

It is an arithmetic number, because the mean of its divisors is an integer number (448305).

Almost surely, 2^12880440 is an apocalyptic number.

12880440 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 12880440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21518640).

12880440 is an abundant number, since it is smaller than the sum of its proper divisors (30156840).

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

12880440 is a wasteful number, since it uses less digits than its factorization.

12880440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021 (or 1014 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 12880440 is about 3588.9329890651. The cubic root of 12880440 is about 234.4104127824.

The spelling of 12880440 in words is "twelve million, eight hundred eighty thousand, four hundred forty".