27228987 has 32 divisors (see below), whose sum is σ = 42508800. Its totient is φ = 17192736.

The previous prime is 27228979. The next prime is 27229021. The reversal of 27228987 is 78982272.

It is a happy number.

It is not a de Polignac number, because 27228987 - 2³ = 27228979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27228947) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101089 + ... + 101357.

It is an arithmetic number, because the mean of its divisors is an integer number (1328400).

Almost surely, 2^27228987 is an apocalyptic number.

27228987 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

27228987 is a deficient number, since it is larger than the sum of its proper divisors (15279813).

27228987 is a wasteful number, since it uses less digits than its factorization.

27228987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464 (or 458 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 27228987 is about 5218.1401859283. The cubic root of 27228987 is about 300.8457136544.

The spelling of 27228987 in words is "twenty-seven million, two hundred twenty-eight thousand, nine hundred eighty-seven".