28274566 has 4 divisors (see below), whose sum is σ = 42411852. Its totient is φ = 14137282.

The previous prime is 28274551. The next prime is 28274569. The reversal of 28274566 is 66547282.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28274569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7068640 + ... + 7068643.

It is an arithmetic number, because the mean of its divisors is an integer number (10602963).

Almost surely, 2^28274566 is an apocalyptic number.

28274566 is a deficient number, since it is larger than the sum of its proper divisors (14137286).

28274566 is a wasteful number, since it uses less digits than its factorization.

28274566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14137285.

The product of its digits is 161280, while the sum is 40.

The square root of 28274566 is about 5317.3833790691. The cubic root of 28274566 is about 304.6482229327.

The spelling of 28274566 in words is "twenty-eight million, two hundred seventy-four thousand, five hundred sixty-six".