28574285 has 4 divisors (see below), whose sum is σ = 34289148. Its totient is φ = 22859424.

The previous prime is 28574279. The next prime is 28574311. The reversal of 28574285 is 58247582.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4583881 + 23990404 = 2141^2 + 4898^2 .

It is a cyclic number.

It is not a de Polignac number, because 28574285 - 2⁴ = 28574269 is a prime.

It is a super-2 number, since 2×28574285² = 1632979526522450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2857424 + ... + 2857433.

It is an arithmetic number, because the mean of its divisors is an integer number (8572287).

Almost surely, 2^28574285 is an apocalyptic number.

It is an amenable number.

28574285 is a deficient number, since it is larger than the sum of its proper divisors (5714863).

28574285 is an equidigital number, since it uses as much as digits as its factorization.

28574285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5714862.

The product of its digits is 179200, while the sum is 41.

The square root of 28574285 is about 5345.4920259972. The cubic root of 28574285 is about 305.7208962028.

The spelling of 28574285 in words is "twenty-eight million, five hundred seventy-four thousand, two hundred eighty-five".