27390644 has 12 divisors (see below), whose sum is σ = 48150144. Its totient is φ = 13633464.

The previous prime is 27390641. The next prime is 27390667. The reversal of 27390644 is 44609372.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27390641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14462 + ... + 16245.

It is an arithmetic number, because the mean of its divisors is an integer number (4012512).

Almost surely, 2^27390644 is an apocalyptic number.

It is an amenable number.

27390644 is a deficient number, since it is larger than the sum of its proper divisors (20759500).

27390644 is a wasteful number, since it uses less digits than its factorization.

27390644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30934 (or 30932 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 27390644 is about 5233.6071690565. The cubic root of 27390644 is about 301.4399074609.

The spelling of 27390644 in words is "twenty-seven million, three hundred ninety thousand, six hundred forty-four".