27945972 has 36 divisors (see below), whose sum is σ = 73260096. Its totient is φ = 9315000.

The previous prime is 27945961. The next prime is 27945997. The reversal of 27945972 is 27954972.

It is a tau number, because it is divible by the number of its divisors (36).

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, 13404 + ... + 15347.

Almost surely, 2^27945972 is an apocalyptic number.

It is an amenable number.

27945972 is an abundant number, since it is smaller than the sum of its proper divisors (45314124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27945972 is a wasteful number, since it uses less digits than its factorization.

27945972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28770 (or 28756 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 27945972 is about 5286.3949909177. The cubic root of 27945972 is about 303.4634609202.

The spelling of 27945972 in words is "twenty-seven million, nine hundred forty-five thousand, nine hundred seventy-two".