27945545 has 8 divisors (see below), whose sum is σ = 34441224. Its totient is φ = 21752064.

The previous prime is 27945517. The next prime is 27945551. The reversal of 27945545 is 54554972.

It can be written as a sum of positive squares in 4 ways, for example, as 7946761 + 19998784 = 2819^2 + 4472^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 27945545 - 2⁶ = 27945481 is a prime.

It is a Duffinian 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, 75344 + ... + 75713.

It is an arithmetic number, because the mean of its divisors is an integer number (4305153).

Almost surely, 2^27945545 is an apocalyptic number.

It is an amenable number.

27945545 is a deficient number, since it is larger than the sum of its proper divisors (6495679).

27945545 is a wasteful number, since it uses less digits than its factorization.

27945545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151099.

The product of its digits is 252000, while the sum is 41.

The square root of 27945545 is about 5286.3546040726. The cubic root of 27945545 is about 303.4619153241.

The spelling of 27945545 in words is "twenty-seven million, nine hundred forty-five thousand, five hundred forty-five".