28815395 has 16 divisors (see below), whose sum is σ = 39809280. Its totient is φ = 19613664.

The previous prime is 28815379. The next prime is 28815403. The reversal of 28815395 is 59351882.

It is not a de Polignac number, because 28815395 - 2⁴ = 28815379 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 1904 + ... + 7826.

It is an arithmetic number, because the mean of its divisors is an integer number (2488080).

Almost surely, 2^28815395 is an apocalyptic number.

28815395 is a deficient number, since it is larger than the sum of its proper divisors (10993885).

28815395 is a wasteful number, since it uses less digits than its factorization.

28815395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6074.

The product of its digits is 86400, while the sum is 41.

The square root of 28815395 is about 5367.9972988071. The cubic root of 28815395 is about 306.5783805141.

Adding to 28815395 its sum of digits (41), we get a triangular number (28815436 = T₇₅₉₁).

The spelling of 28815395 in words is "twenty-eight million, eight hundred fifteen thousand, three hundred ninety-five".