13968815 has 24 divisors (see below), whose sum is σ = 20365152. Its totient is φ = 9008640.

The previous prime is 13968811. The next prime is 13968821. The reversal of 13968815 is 51886931.

It is not a de Polignac number, because 13968815 - 2² = 13968811 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13968811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9425 + ... + 10805.

It is an arithmetic number, because the mean of its divisors is an integer number (848548).

Almost surely, 2^13968815 is an apocalyptic number.

13968815 is a deficient number, since it is larger than the sum of its proper divisors (6396337).

13968815 is a wasteful number, since it uses less digits than its factorization.

13968815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1427 (or 1410 counting only the distinct ones).

The product of its digits is 51840, while the sum is 41.

The square root of 13968815 is about 3737.4877926222. The cubic root of 13968815 is about 240.8351403171.

The spelling of 13968815 in words is "thirteen million, nine hundred sixty-eight thousand, eight hundred fifteen".