13365840 has 40 divisors (see below), whose sum is σ = 41434848. Its totient is φ = 3564160.

The previous prime is 13365817. The next prime is 13365883. The reversal of 13365840 is 4856331.

13365840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 13365798 and 13365807.

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, 27606 + ... + 28085.

Almost surely, 2^13365840 is an apocalyptic number.

13365840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13365840 is an abundant number, since it is smaller than the sum of its proper divisors (28069008).

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

13365840 is a wasteful number, since it uses less digits than its factorization.

13365840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55707 (or 55701 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 13365840 is about 3655.9321656727. The cubic root of 13365840 is about 237.3187684816.

The spelling of 13365840 in words is "thirteen million, three hundred sixty-five thousand, eight hundred forty".