27745972 has 24 divisors (see below), whose sum is σ = 52262280. Its totient is φ = 12840960.

The previous prime is 27745969. The next prime is 27746003. The reversal of 27745972 is 27954772.

It can be written as a sum of positive squares in 4 ways, for example, as 4648336 + 23097636 = 2156^2 + 4806^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 804 + ... + 7492.

It is an arithmetic number, because the mean of its divisors is an integer number (2177595).

Almost surely, 2^27745972 is an apocalyptic number.

It is an amenable number.

27745972 is a deficient number, since it is larger than the sum of its proper divisors (24516308).

27745972 is a wasteful number, since it uses less digits than its factorization.

27745972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6771 (or 6769 counting only the distinct ones).

The product of its digits is 246960, while the sum is 43.

The square root of 27745972 is about 5267.4445417109. Note that the first 3 decimals coincide. The cubic root of 27745972 is about 302.7377981260.

The spelling of 27745972 in words is "twenty-seven million, seven hundred forty-five thousand, nine hundred seventy-two".