28296197 has 4 divisors (see below), whose sum is σ = 28382016. Its totient is φ = 28210380.

The previous prime is 28296179. The next prime is 28296221. The reversal of 28296197 is 79169282.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79169282 = 2 ⋅39584641.

It is a cyclic number.

It is not a de Polignac number, because 28296197 - 2⁶ = 28296133 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 (28296137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42413 + ... + 43074.

It is an arithmetic number, because the mean of its divisors is an integer number (7095504).

Almost surely, 2^28296197 is an apocalyptic number.

It is an amenable number.

28296197 is a deficient number, since it is larger than the sum of its proper divisors (85819).

28296197 is an equidigital number, since it uses as much as digits as its factorization.

28296197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85818.

The product of its digits is 108864, while the sum is 44.

The square root of 28296197 is about 5319.4169793315. The cubic root of 28296197 is about 304.7258918636.

The spelling of 28296197 in words is "twenty-eight million, two hundred ninety-six thousand, one hundred ninety-seven".