28134815 has 16 divisors (see below), whose sum is σ = 35090496. Its totient is φ = 21638400.

The previous prime is 28134809. The next prime is 28134829. The reversal of 28134815 is 51843182.

It is not a de Polignac number, because 28134815 - 2⁶ = 28134751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13589 + ... + 15521.

It is an arithmetic number, because the mean of its divisors is an integer number (2193156).

Almost surely, 2^28134815 is an apocalyptic number.

28134815 is a deficient number, since it is larger than the sum of its proper divisors (6955681).

28134815 is a wasteful number, since it uses less digits than its factorization.

28134815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050.

The product of its digits is 7680, while the sum is 32.

The square root of 28134815 is about 5304.2261452544. The cubic root of 28134815 is about 304.1454715533.

Adding to 28134815 its reverse (51843182), we get a palindrome (79977997).

The spelling of 28134815 in words is "twenty-eight million, one hundred thirty-four thousand, eight hundred fifteen".