27728286 has 8 divisors (see below), whose sum is σ = 55456584. Its totient is φ = 9242760.

The previous prime is 27728231. The next prime is 27728287. The reversal of 27728286 is 68282772.

It is a sphenic number, since it is the product of 3 distinct primes.

27728286 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27728287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2310685 + ... + 2310696.

It is an arithmetic number, because the mean of its divisors is an integer number (6932073).

Almost surely, 2^27728286 is an apocalyptic number.

27728286 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

27728286 is a wasteful number, since it uses less digits than its factorization.

27728286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4621386.

The product of its digits is 150528, while the sum is 42.

The square root of 27728286 is about 5265.7654714201. The cubic root of 27728286 is about 302.6734601536.

The spelling of 27728286 in words is "twenty-seven million, seven hundred twenty-eight thousand, two hundred eighty-six".