27668745 has 24 divisors (see below), whose sum is σ = 51649416. Its totient is φ = 13621248.

The previous prime is 27668743. The next prime is 27668749. The reversal of 27668745 is 54786672.

It can be written as a sum of positive squares in 4 ways, for example, as 11664 + 27657081 = 108^2 + 5259^2 .

It is not a de Polignac number, because 27668745 - 2¹ = 27668743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 27668745.

It is not an unprimeable number, because it can be changed into a prime (27668743) 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, 23064 + ... + 24233.

It is an arithmetic number, because the mean of its divisors is an integer number (2152059).

Almost surely, 2^27668745 is an apocalyptic number.

It is an amenable number.

27668745 is a deficient number, since it is larger than the sum of its proper divisors (23980671).

27668745 is a wasteful number, since it uses less digits than its factorization.

27668745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47321 (or 47318 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 27668745 is about 5260.1088391781. The cubic root of 27668745 is about 302.4566611409.

It can be divided in two parts, 2766 and 8745, that added together give a palindrome (11511).

The spelling of 27668745 in words is "twenty-seven million, six hundred sixty-eight thousand, seven hundred forty-five".