13909990 has 16 divisors (see below), whose sum is σ = 25135920. Its totient is φ = 5542240.

The previous prime is 13909981. The next prime is 13909991. The reversal of 13909990 is 9990931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13909991) 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, 105 + ... + 5275.

It is an arithmetic number, because the mean of its divisors is an integer number (1570995).

Almost surely, 2^13909990 is an apocalyptic number.

13909990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13909990 is a deficient number, since it is larger than the sum of its proper divisors (11225930).

13909990 is a wasteful number, since it uses less digits than its factorization.

13909990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5447.

The product of its (nonzero) digits is 19683, while the sum is 40.

The square root of 13909990 is about 3729.6098991718. The cubic root of 13909990 is about 240.4965990618.

The spelling of 13909990 in words is "thirteen million, nine hundred nine thousand, nine hundred ninety".