13055440 has 20 divisors (see below), whose sum is σ = 30354084. Its totient is φ = 5222144.

The previous prime is 13055431. The next prime is 13055447. The reversal of 13055440 is 4455031.

13055440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9684544 + 3370896 = 3112^2 + 1836^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13055447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81517 + ... + 81676.

Almost surely, 2^13055440 is an apocalyptic number.

13055440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13055440 is an abundant number, since it is smaller than the sum of its proper divisors (17298644).

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

13055440 is a wasteful number, since it uses less digits than its factorization.

13055440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163206 (or 163200 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 13055440 is about 3613.2312408701. The cubic root of 13055440 is about 235.4672460130.

The spelling of 13055440 in words is "thirteen million, fifty-five thousand, four hundred forty".