28567197 has 12 divisors (see below), whose sum is σ = 41399644. Its totient is φ = 18982080.

The previous prime is 28567193. The next prime is 28567199. The reversal of 28567197 is 79176582.

It can be written as a sum of positive squares in 2 ways, for example, as 1879641 + 26687556 = 1371^2 + 5166^2 .

It is not a de Polignac number, because 28567197 - 2² = 28567193 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28567193) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2254 + ... + 7887.

Almost surely, 2^28567197 is an apocalyptic number.

It is an amenable number.

28567197 is a deficient number, since it is larger than the sum of its proper divisors (12832447).

28567197 is a wasteful number, since it uses less digits than its factorization.

28567197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10460 (or 10457 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 28567197 is about 5344.8289963291. The cubic root of 28567197 is about 305.6956155596.

The spelling of 28567197 in words is "twenty-eight million, five hundred sixty-seven thousand, one hundred ninety-seven".