13988624 has 40 divisors (see below), whose sum is σ = 29503320. Its totient is φ = 6386688.

The previous prime is 13988599. The next prime is 13988629. The reversal of 13988624 is 42688931.

It can be written as a sum of positive squares in 4 ways, for example, as 1024 + 13987600 = 32^2 + 3740^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13988629) 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 7 ways as a sum of consecutive naturals, for example, 22364 + ... + 22980.

It is an arithmetic number, because the mean of its divisors is an integer number (737583).

Almost surely, 2^13988624 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 13988624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14751660).

13988624 is an abundant number, since it is smaller than the sum of its proper divisors (15514696).

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

13988624 is a wasteful number, since it uses less digits than its factorization.

13988624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747 (or 741 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 13988624 is about 3740.1368958903. The cubic root of 13988624 is about 240.9489283031.

The spelling of 13988624 in words is "thirteen million, nine hundred eighty-eight thousand, six hundred twenty-four".