13890044 has 12 divisors (see below), whose sum is σ = 27780144. Its totient is φ = 5952864.

The previous prime is 13890031. The next prime is 13890113. The reversal of 13890044 is 44009831.

13890044 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 13889989 and 13890016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248009 + ... + 248064.

It is an arithmetic number, because the mean of its divisors is an integer number (2315012).

Almost surely, 2^13890044 is an apocalyptic number.

13890044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

13890044 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

13890044 is a wasteful number, since it uses less digits than its factorization.

13890044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496084 (or 496082 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 13890044 is about 3726.9349336955. The cubic root of 13890044 is about 240.3815920339.

Adding to 13890044 its reverse (44009831), we get a palindrome (57899875).

The spelling of 13890044 in words is "thirteen million, eight hundred ninety thousand, forty-four".