13998656 has 28 divisors (see below), whose sum is σ = 31747968. Its totient is φ = 5999232.

The previous prime is 13998653. The next prime is 13998659. The reversal of 13998656 is 65689931.

It is an interprime number because it is at equal distance from previous prime (13998653) and next prime (13998659).

It is a tau number, because it is divible by the number of its divisors (28).

It is a self number, because there is not a number n which added to its sum of digits gives 13998656.

It is not an unprimeable number, because it can be changed into a prime (13998653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15176 + ... + 16071.

It is an arithmetic number, because the mean of its divisors is an integer number (1133856).

Almost surely, 2^13998656 is an apocalyptic number.

13998656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13998656 is an abundant number, since it is smaller than the sum of its proper divisors (17749312).

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

13998656 is an equidigital number, since it uses as much as digits as its factorization.

13998656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31266 (or 31256 counting only the distinct ones).

The product of its digits is 349920, while the sum is 47.

The square root of 13998656 is about 3741.4777829088. The cubic root of 13998656 is about 241.0065137155.

The spelling of 13998656 in words is "thirteen million, nine hundred ninety-eight thousand, six hundred fifty-six".