27968445 has 12 divisors (see below), whose sum is σ = 48478716. Its totient is φ = 14916480.

The previous prime is 27968429. The next prime is 27968453. The reversal of 27968445 is 54486972.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7338681 + 20629764 = 2709^2 + 4542^2 .

It is not a de Polignac number, because 27968445 - 2⁴ = 27968429 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 621521 = 27968445 / (2 + 7 + 9 + 6 + 8 + 4 + 4 + 5).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 27968445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 310716 + ... + 310805.

It is an arithmetic number, because the mean of its divisors is an integer number (4039893).

Almost surely, 2^27968445 is an apocalyptic number.

It is an amenable number.

27968445 is a deficient number, since it is larger than the sum of its proper divisors (20510271).

27968445 is a wasteful number, since it uses less digits than its factorization.

27968445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621532 (or 621529 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 27968445 is about 5288.5201143609. The cubic root of 27968445 is about 303.5447833987.

The spelling of 27968445 in words is "twenty-seven million, nine hundred sixty-eight thousand, four hundred forty-five".