13990305 has 16 divisors (see below), whose sum is σ = 25582464. Its totient is φ = 6395520.

The previous prime is 13990283. The next prime is 13990313. The reversal of 13990305 is 50309931.

It is not a de Polignac number, because 13990305 - 2⁶ = 13990241 is a prime.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 66516 + ... + 66725.

It is an arithmetic number, because the mean of its divisors is an integer number (1598904).

Almost surely, 2^13990305 is an apocalyptic number.

13990305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13990305 is a deficient number, since it is larger than the sum of its proper divisors (11592159).

13990305 is a wasteful number, since it uses less digits than its factorization.

13990305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133256.

The product of its (nonzero) digits is 3645, while the sum is 30.

The square root of 13990305 is about 3740.3616135342. The cubic root of 13990305 is about 240.9585794531.

The spelling of 13990305 in words is "thirteen million, nine hundred ninety thousand, three hundred five".