13056440 has 32 divisors (see below), whose sum is σ = 29864160. Its totient is φ = 5136000.

The previous prime is 13056437. The next prime is 13056499. The reversal of 13056440 is 4465031.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236 + ... + 5115.

It is an arithmetic number, because the mean of its divisors is an integer number (933255).

Almost surely, 2^13056440 is an apocalyptic number.

13056440 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 13056440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14932080).

13056440 is an abundant number, since it is smaller than the sum of its proper divisors (16807720).

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

13056440 is a wasteful number, since it uses less digits than its factorization.

13056440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5423 (or 5419 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 13056440 is about 3613.3696185140. The cubic root of 13056440 is about 235.4732578425.

The spelling of 13056440 in words is "thirteen million, fifty-six thousand, four hundred forty".