13990426 has 8 divisors (see below), whose sum is σ = 21251520. Its totient is φ = 6906588.

The previous prime is 13990409. The next prime is 13990433. The reversal of 13990426 is 62409931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×13990426² = 391464039322952, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13990391 and 13990400.

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 3 ways as a sum of consecutive naturals, for example, 44116 + ... + 44431.

It is an arithmetic number, because the mean of its divisors is an integer number (2656440).

Almost surely, 2^13990426 is an apocalyptic number.

13990426 is a deficient number, since it is larger than the sum of its proper divisors (7261094).

13990426 is an equidigital number, since it uses as much as digits as its factorization.

13990426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88628.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 13990426 is about 3740.3777884059. The cubic root of 13990426 is about 240.9592741224.

The spelling of 13990426 in words is "thirteen million, nine hundred ninety thousand, four hundred twenty-six".