27472985 has 4 divisors (see below), whose sum is σ = 32967588. Its totient is φ = 21978384.

The previous prime is 27472979. The next prime is 27472987. The reversal of 27472985 is 58927472.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3345241 + 24127744 = 1829^2 + 4912^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27472985 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27472987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2747294 + ... + 2747303.

It is an arithmetic number, because the mean of its divisors is an integer number (8241897).

Almost surely, 2^27472985 is an apocalyptic number.

It is an amenable number.

27472985 is a deficient number, since it is larger than the sum of its proper divisors (5494603).

27472985 is an equidigital number, since it uses as much as digits as its factorization.

27472985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5494602.

The product of its digits is 282240, while the sum is 44.

The square root of 27472985 is about 5241.4678287671. The cubic root of 27472985 is about 301.7416654011.

The spelling of 27472985 in words is "twenty-seven million, four hundred seventy-two thousand, nine hundred eighty-five".