27897772 has 24 divisors (see below), whose sum is σ = 55919360. Its totient is φ = 11929680.

The previous prime is 27897767. The next prime is 27897773. The reversal of 27897772 is 27779872.

It is not an unprimeable number, because it can be changed into a prime (27897773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16879 + ... + 18457.

Almost surely, 2^27897772 is an apocalyptic number.

It is an amenable number.

27897772 is an abundant number, since it is smaller than the sum of its proper divisors (28021588).

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

27897772 is a wasteful number, since it uses less digits than its factorization.

27897772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221 (or 2219 counting only the distinct ones).

The product of its digits is 691488, while the sum is 49.

The square root of 27897772 is about 5281.8341511259. The cubic root of 27897772 is about 303.2888936494.

The spelling of 27897772 in words is "twenty-seven million, eight hundred ninety-seven thousand, seven hundred seventy-two".