13987824 has 40 divisors (see below), whose sum is σ = 36580992. Its totient is φ = 4605120.

The previous prime is 13987807. The next prime is 13987843. The reversal of 13987824 is 42878931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2229 + ... + 5739.

Almost surely, 2^13987824 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 13987824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18290496).

13987824 is an abundant number, since it is smaller than the sum of its proper divisors (22593168).

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

13987824 is a wasteful number, since it uses less digits than its factorization.

13987824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3605 (or 3599 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 13987824 is about 3740.0299464042. The cubic root of 13987824 is about 240.9443349798.

The spelling of 13987824 in words is "thirteen million, nine hundred eighty-seven thousand, eight hundred twenty-four".