13868664 has 32 divisors (see below), whose sum is σ = 34791120. Its totient is φ = 4606976.

The previous prime is 13868653. The next prime is 13868671. The reversal of 13868664 is 46686831.

It is a happy number.

It is a super-2 number, since 2×13868664² = 384679682289792, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

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, 7654 + ... + 9290.

Almost surely, 2^13868664 is an apocalyptic number.

It is an amenable number.

13868664 is an abundant number, since it is smaller than the sum of its proper divisors (20922456).

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

13868664 is a wasteful number, since it uses less digits than its factorization.

13868664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999 (or 1995 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 13868664 is about 3724.0655203688. The cubic root of 13868664 is about 240.2581943546.

The spelling of 13868664 in words is "thirteen million, eight hundred sixty-eight thousand, six hundred sixty-four".