28197315 has 20 divisors (see below), whose sum is σ = 50547024. Its totient is φ = 15038352.

The previous prime is 28197289. The next prime is 28197343. The reversal of 28197315 is 51379182.

It is not a de Polignac number, because 28197315 - 2⁷ = 28197187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28197315.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 34407 + ... + 35216.

Almost surely, 2^28197315 is an apocalyptic number.

28197315 is a deficient number, since it is larger than the sum of its proper divisors (22349709).

28197315 is an equidigital number, since it uses as much as digits as its factorization.

28197315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69640 (or 69631 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 28197315 is about 5310.1144055472. The cubic root of 28197315 is about 304.3705193386.

The spelling of 28197315 in words is "twenty-eight million, one hundred ninety-seven thousand, three hundred fifteen".