13888665 has 96 divisors (see below), whose sum is σ = 30191616. Its totient is φ = 5987520.

The previous prime is 13888607. The next prime is 13888669. The reversal of 13888665 is 56688831.

It is not a de Polignac number, because 13888665 - 2⁹ = 13888153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 13888665.

It is not an unprimeable number, because it can be changed into a prime (13888669) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 195580 + ... + 195650.

It is an arithmetic number, because the mean of its divisors is an integer number (314496).

Almost surely, 2^13888665 is an apocalyptic number.

13888665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13888665 is an abundant number, since it is smaller than the sum of its proper divisors (16302951).

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

13888665 is an equidigital number, since it uses as much as digits as its factorization.

13888665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 109 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 13888665 is about 3726.7499245321. The cubic root of 13888665 is about 240.3736367630.

The spelling of 13888665 in words is "thirteen million, eight hundred eighty-eight thousand, six hundred sixty-five".