27772428 has 12 divisors (see below), whose sum is σ = 64802360. Its totient is φ = 9257472.

The previous prime is 27772417. The next prime is 27772463. The reversal of 27772428 is 82427772.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1157173 + ... + 1157196.

Almost surely, 2^27772428 is an apocalyptic number.

It is an amenable number.

27772428 is an abundant number, since it is smaller than the sum of its proper divisors (37029932).

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

27772428 is a wasteful number, since it uses less digits than its factorization.

27772428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2314376 (or 2314374 counting only the distinct ones).

The product of its digits is 87808, while the sum is 39.

The square root of 27772428 is about 5269.9552180261. The cubic root of 27772428 is about 302.8339885077.

The spelling of 27772428 in words is "twenty-seven million, seven hundred seventy-two thousand, four hundred twenty-eight".