13990078 has 16 divisors (see below), whose sum is σ = 21411936. Its totient is φ = 6854400.

The previous prime is 13990073. The next prime is 13990087. The reversal of 13990078 is 87009931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13990073) 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, 22978 + ... + 23578.

It is an arithmetic number, because the mean of its divisors is an integer number (1338246).

Almost surely, 2^13990078 is an apocalyptic number.

13990078 is a deficient number, since it is larger than the sum of its proper divisors (7421858).

13990078 is a wasteful number, since it uses less digits than its factorization.

13990078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 13990078 is about 3740.3312687515. The cubic root of 13990078 is about 240.9572762198.

The spelling of 13990078 in words is "thirteen million, nine hundred ninety thousand, seventy-eight".