13939998 has 32 divisors (see below), whose sum is σ = 28968192. Its totient is φ = 4468800.

The previous prime is 13939997. The next prime is 13940011. The reversal of 13939998 is 89993931.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13939998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13939997) by changing a digit.

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, 17938 + ... + 18698.

It is an arithmetic number, because the mean of its divisors is an integer number (905256).

Almost surely, 2^13939998 is an apocalyptic number.

13939998 is an abundant number, since it is smaller than the sum of its proper divisors (15028194).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13939998 is a wasteful number, since it uses less digits than its factorization.

13939998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880.

The product of its digits is 472392, while the sum is 51.

The square root of 13939998 is about 3733.6306726831. The cubic root of 13939998 is about 240.6694158298.

The spelling of 13939998 in words is "thirteen million, nine hundred thirty-nine thousand, nine hundred ninety-eight".