13845564 has 18 divisors (see below), whose sum is σ = 34998600. Its totient is φ = 4615176.

The previous prime is 13845541. The next prime is 13845571. The reversal of 13845564 is 46554831.

It is a happy number.

13845564 is a `hidden beast` number, since 13 + 84 + 5 + 564 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 384599 = 13845564 / (1 + 3 + 8 + 4 + 5 + 5 + 6 + 4).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 192264 + ... + 192335.

Almost surely, 2^13845564 is an apocalyptic number.

It is an amenable number.

13845564 is an abundant number, since it is smaller than the sum of its proper divisors (21153036).

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

13845564 is a wasteful number, since it uses less digits than its factorization.

13845564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384609 (or 384604 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 13845564 is about 3720.9627786367. The cubic root of 13845564 is about 240.1247268355.

The spelling of 13845564 in words is "thirteen million, eight hundred forty-five thousand, five hundred sixty-four".