13990432 has 12 divisors (see below), whose sum is σ = 27543726. Its totient is φ = 6995200.

The previous prime is 13990409. The next prime is 13990433. The reversal of 13990432 is 23409931.

It can be written as a sum of positive squares in only one way, i.e., 12362256 + 1628176 = 3516^2 + 1276^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13990394 and 13990403.

It is not an unprimeable number, because it can be changed into a prime (13990433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 218569 + ... + 218632.

Almost surely, 2^13990432 is an apocalyptic number.

It is an amenable number.

13990432 is a deficient number, since it is larger than the sum of its proper divisors (13553294).

13990432 is an equidigital number, since it uses as much as digits as its factorization.

13990432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437211 (or 437203 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 13990432 is about 3740.3785904638. The cubic root of 13990432 is about 240.9593085687.

The spelling of 13990432 in words is "thirteen million, nine hundred ninety thousand, four hundred thirty-two".