28249315 has 12 divisors (see below), whose sum is σ = 34848576. Its totient is φ = 21983328.

The previous prime is 28249289. The next prime is 28249327. The reversal of 28249315 is 51394282.

It is not a de Polignac number, because 28249315 - 2⁷ = 28249187 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4782 + ... + 8908.

It is an arithmetic number, because the mean of its divisors is an integer number (2904048).

Almost surely, 2^28249315 is an apocalyptic number.

28249315 is a deficient number, since it is larger than the sum of its proper divisors (6599261).

28249315 is an equidigital number, since it uses as much as digits as its factorization.

28249315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4206 (or 4169 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 28249315 is about 5315.0084665972. The cubic root of 28249315 is about 304.5575057910.

The spelling of 28249315 in words is "twenty-eight million, two hundred forty-nine thousand, three hundred fifteen".