27807228 has 36 divisors (see below), whose sum is σ = 70808920. Its totient is φ = 9200736.

The previous prime is 27807193. The next prime is 27807229. The reversal of 27807228 is 82270872.

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 27807192 and 27807201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27807229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2226 + ... + 7782.

Almost surely, 2^27807228 is an apocalyptic number.

It is an amenable number.

27807228 is an abundant number, since it is smaller than the sum of its proper divisors (43001692).

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

27807228 is a wasteful number, since it uses less digits than its factorization.

27807228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5706 (or 5701 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 27807228 is about 5273.2559202072. The cubic root of 27807228 is about 302.9604235471.

The spelling of 27807228 in words is "twenty-seven million, eight hundred seven thousand, two hundred twenty-eight".