13988990 has 16 divisors (see below), whose sum is σ = 25526448. Its totient is φ = 5518656.

The previous prime is 13988987. The next prime is 13988993. The reversal of 13988990 is 9988931.

It is an interprime number because it is at equal distance from previous prime (13988987) and next prime (13988993).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13988993) 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, 8852 + ... + 10311.

It is an arithmetic number, because the mean of its divisors is an integer number (1595403).

Almost surely, 2^13988990 is an apocalyptic number.

13988990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13988990 is a deficient number, since it is larger than the sum of its proper divisors (11537458).

13988990 is a wasteful number, since it uses less digits than its factorization.

13988990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19243.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 13988990 is about 3740.1858242606. The cubic root of 13988990 is about 240.9510296901.

The spelling of 13988990 in words is "thirteen million, nine hundred eighty-eight thousand, nine hundred ninety".