28084274 has 4 divisors (see below), whose sum is σ = 42126414. Its totient is φ = 14042136.

The previous prime is 28084271. The next prime is 28084283. The reversal of 28084274 is 47248082.

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

It can be written as a sum of positive squares in only one way, i.e., 20205025 + 7879249 = 4495^2 + 2807^2 .

It is a super-2 number, since 2×28084274² = 1577452892214152, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28084271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7021067 + ... + 7021070.

Almost surely, 2^28084274 is an apocalyptic number.

28084274 is a deficient number, since it is larger than the sum of its proper divisors (14042140).

28084274 is a wasteful number, since it uses less digits than its factorization.

28084274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14042139.

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 28084274 is about 5299.4597837893. The cubic root of 28084274 is about 303.9632414581.

The spelling of 28084274 in words is "twenty-eight million, eighty-four thousand, two hundred seventy-four".