27918645 has 16 divisors (see below), whose sum is σ = 44860992. Its totient is φ = 14826240.

The previous prime is 27918617. The next prime is 27918647. The reversal of 27918645 is 54681972.

It is not a de Polignac number, because 27918645 - 2⁵ = 27918613 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 27918597 and 27918606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27918647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247 + ... + 7476.

It is an arithmetic number, because the mean of its divisors is an integer number (2803812).

Almost surely, 2^27918645 is an apocalyptic number.

It is an amenable number.

27918645 is a deficient number, since it is larger than the sum of its proper divisors (16942347).

27918645 is a wasteful number, since it uses less digits than its factorization.

27918645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7972.

The product of its digits is 120960, while the sum is 42.

The square root of 27918645 is about 5283.8097051275. The cubic root of 27918645 is about 303.3645146333.

The spelling of 27918645 in words is "twenty-seven million, nine hundred eighteen thousand, six hundred forty-five".