13889544 has 64 divisors (see below), whose sum is σ = 37454400. Its totient is φ = 4276224.

The previous prime is 13889531. The next prime is 13889567. The reversal of 13889544 is 44598831.

13889544 = T₄₂₅ + T₄₂₆ + ... + T₅₄₂.

It is a junction number, because it is equal to n+sod(n) for n = 13889496 and 13889505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23784 + ... + 24360.

It is an arithmetic number, because the mean of its divisors is an integer number (585225).

Almost surely, 2^13889544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13889544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18727200).

13889544 is an abundant number, since it is smaller than the sum of its proper divisors (23564856).

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

13889544 is a wasteful number, since it uses less digits than its factorization.

13889544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662 (or 658 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 13889544 is about 3726.8678538419. The cubic root of 13889544 is about 240.3787076600.

The spelling of 13889544 in words is "thirteen million, eight hundred eighty-nine thousand, five hundred forty-four".