27243645 has 48 divisors (see below), whose sum is σ = 51544512. Its totient is φ = 12180480.

The previous prime is 27243613. The next prime is 27243647. The reversal of 27243645 is 54634272.

It is not a de Polignac number, because 27243645 - 2⁵ = 27243613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27243647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27397 + ... + 28373.

It is an arithmetic number, because the mean of its divisors is an integer number (1073844).

Almost surely, 2^27243645 is an apocalyptic number.

It is an amenable number.

27243645 is a deficient number, since it is larger than the sum of its proper divisors (24300867).

27243645 is a wasteful number, since it uses less digits than its factorization.

27243645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022 (or 1009 counting only the distinct ones).

The product of its digits is 40320, while the sum is 33.

The square root of 27243645 is about 5219.5445203581. The cubic root of 27243645 is about 300.8996880630.

The spelling of 27243645 in words is "twenty-seven million, two hundred forty-three thousand, six hundred forty-five".