28047297 has 16 divisors (see below), whose sum is σ = 40442112. Its totient is φ = 17222400.

The previous prime is 28047269. The next prime is 28047301. The reversal of 28047297 is 79274082.

It is not a de Polignac number, because 28047297 - 2²⁰ = 26998721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28047197) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3454 + ... + 8247.

It is an arithmetic number, because the mean of its divisors is an integer number (2527632).

Almost surely, 2^28047297 is an apocalyptic number.

It is an amenable number.

28047297 is a deficient number, since it is larger than the sum of its proper divisors (12394815).

28047297 is a wasteful number, since it uses less digits than its factorization.

28047297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11768.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 28047297 is about 5295.9698828449. The cubic root of 28047297 is about 303.8297790410.

It can be divided in two parts, 2804 and 7297, that added together give a palindrome (10101).

The spelling of 28047297 in words is "twenty-eight million, forty-seven thousand, two hundred ninety-seven".