13989906 has 24 divisors (see below), whose sum is σ = 34641984. Its totient is φ = 3997080.

The previous prime is 13989869. The next prime is 13989907. The reversal of 13989906 is 60998931.

It is not an unprimeable number, because it can be changed into a prime (13989907) 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 in 11 ways as a sum of consecutive naturals, for example, 55390 + ... + 55641.

It is an arithmetic number, because the mean of its divisors is an integer number (1443416).

Almost surely, 2^13989906 is an apocalyptic number.

13989906 is an abundant number, since it is smaller than the sum of its proper divisors (20652078).

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

13989906 is a wasteful number, since it uses less digits than its factorization.

13989906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111046 (or 111043 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 13989906 is about 3740.3082760650. The cubic root of 13989906 is about 240.9562887385.

The spelling of 13989906 in words is "thirteen million, nine hundred eighty-nine thousand, nine hundred six".