13990756 has 24 divisors (see below), whose sum is σ = 26611704. Its totient is φ = 6397440.

The previous prime is 13990751. The next prime is 13990793. The reversal of 13990756 is 65709931.

It can be written as a sum of positive squares in 4 ways, for example, as 3297856 + 10692900 = 1816^2 + 3270^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13990751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4686 + ... + 7066.

It is an arithmetic number, because the mean of its divisors is an integer number (1108821).

Almost surely, 2^13990756 is an apocalyptic number.

It is an amenable number.

13990756 is a deficient number, since it is larger than the sum of its proper divisors (12620948).

13990756 is a wasteful number, since it uses less digits than its factorization.

13990756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2511 (or 2509 counting only the distinct ones).

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 13990756 is about 3740.4219013368. The cubic root of 13990756 is about 240.9611686545.

The spelling of 13990756 in words is "thirteen million, nine hundred ninety thousand, seven hundred fifty-six".