13986840 has 64 divisors (see below), whose sum is σ = 47957760. Its totient is φ = 3196800.

The previous prime is 13986823. The next prime is 13986887. The reversal of 13986840 is 4868931.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7486 + ... + 9165.

It is an arithmetic number, because the mean of its divisors is an integer number (749340).

Almost surely, 2^13986840 is an apocalyptic number.

13986840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13986840 is an abundant number, since it is smaller than the sum of its proper divisors (33970920).

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

13986840 is a wasteful number, since it uses less digits than its factorization.

13986840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16672 (or 16668 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 13986840 is about 3739.8983943418. The cubic root of 13986840 is about 240.9386849520.

The spelling of 13986840 in words is "thirteen million, nine hundred eighty-six thousand, eight hundred forty".