13900864 has 14 divisors (see below), whose sum is σ = 27584654. Its totient is φ = 6950400.

The previous prime is 13900853. The next prime is 13900867. The reversal of 13900864 is 46800931.

It can be written as a sum of positive squares in only one way, i.e., 7182400 + 6718464 = 2680^2 + 2592^2 .

It is not an unprimeable number, because it can be changed into a prime (13900867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108537 + ... + 108664.

Almost surely, 2^13900864 is an apocalyptic number.

It is an amenable number.

13900864 is a deficient number, since it is larger than the sum of its proper divisors (13683790).

13900864 is an equidigital number, since it uses as much as digits as its factorization.

13900864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217213 (or 217203 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 13900864 is about 3728.3862460856. The cubic root of 13900864 is about 240.4439929345.

The spelling of 13900864 in words is "thirteen million, nine hundred thousand, eight hundred sixty-four".