27748645 has 8 divisors (see below), whose sum is σ = 35051040. Its totient is φ = 21030480.

The previous prime is 27748613. The next prime is 27748657. The reversal of 27748645 is 54684772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27748645 - 2⁵ = 27748613 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 145951 + ... + 146140.

It is an arithmetic number, because the mean of its divisors is an integer number (4381380).

Almost surely, 2^27748645 is an apocalyptic number.

It is an amenable number.

27748645 is a deficient number, since it is larger than the sum of its proper divisors (7302395).

27748645 is a wasteful number, since it uses less digits than its factorization.

27748645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292115.

The product of its digits is 376320, while the sum is 43.

The square root of 27748645 is about 5267.6982639479. The cubic root of 27748645 is about 302.7475195629.

The spelling of 27748645 in words is "twenty-seven million, seven hundred forty-eight thousand, six hundred forty-five".