28253315 has 8 divisors (see below), whose sum is σ = 35378208. Its totient is φ = 21619840.

The previous prime is 28253273. The next prime is 28253327. The reversal of 28253315 is 51335282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28253315 - 2²⁰ = 27204739 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122726 + ... + 122955.

It is an arithmetic number, because the mean of its divisors is an integer number (4422276).

Almost surely, 2^28253315 is an apocalyptic number.

28253315 is a deficient number, since it is larger than the sum of its proper divisors (7124893).

28253315 is a wasteful number, since it uses less digits than its factorization.

28253315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245709.

The product of its digits is 7200, while the sum is 29.

The square root of 28253315 is about 5315.3847461872. The cubic root of 28253315 is about 304.5718798566.

Adding to 28253315 its reverse (51335282), we get a palindrome (79588597).

The spelling of 28253315 in words is "twenty-eight million, two hundred fifty-three thousand, three hundred fifteen".