13040756 has 24 divisors (see below), whose sum is σ = 23473800. Its totient is φ = 6336512.

The previous prime is 13040743. The next prime is 13040771. The reversal of 13040756 is 65704031.

It can be written as a sum of positive squares in 4 ways, for example, as 4243600 + 8797156 = 2060^2 + 2966^2 .

It is a super-2 number, since 2×13040756² = 340122634103072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28820 + ... + 29268.

It is an arithmetic number, because the mean of its divisors is an integer number (978075).

Almost surely, 2^13040756 is an apocalyptic number.

It is an amenable number.

13040756 is a deficient number, since it is larger than the sum of its proper divisors (10433044).

13040756 is a wasteful number, since it uses less digits than its factorization.

13040756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 13040756 is about 3611.1986929550. The cubic root of 13040756 is about 235.3789329381.

Adding to 13040756 its reverse (65704031), we get a palindrome (78744787).

The spelling of 13040756 in words is "thirteen million, forty thousand, seven hundred fifty-six".