13890765 has 24 divisors (see below), whose sum is σ = 25855200. Its totient is φ = 6349728.

The previous prime is 13890749. The next prime is 13890769. The reversal of 13890765 is 56709831.

It is not a de Polignac number, because 13890765 - 2⁴ = 13890749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13890769) 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, 8715 + ... + 10184.

It is an arithmetic number, because the mean of its divisors is an integer number (1077300).

Almost surely, 2^13890765 is an apocalyptic number.

13890765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13890765 is a deficient number, since it is larger than the sum of its proper divisors (11964435).

13890765 is a wasteful number, since it uses less digits than its factorization.

13890765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18921 (or 18914 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 13890765 is about 3727.0316607188. The cubic root of 13890765 is about 240.3857511790.

The spelling of 13890765 in words is "thirteen million, eight hundred ninety thousand, seven hundred sixty-five".