28104715 has 8 divisors (see below), whose sum is σ = 33921648. Its totient is φ = 22353120.

The previous prime is 28104701. The next prime is 28104733. The reversal of 28104715 is 51740182.

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

It is not a de Polignac number, because 28104715 - 2²¹ = 26007563 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15381 + ... + 17110.

It is an arithmetic number, because the mean of its divisors is an integer number (4240206).

Almost surely, 2^28104715 is an apocalyptic number.

28104715 is a deficient number, since it is larger than the sum of its proper divisors (5816933).

28104715 is a wasteful number, since it uses less digits than its factorization.

28104715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32669.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 28104715 is about 5301.3880257910. The cubic root of 28104715 is about 304.0369696210.

Adding to 28104715 its reverse (51740182), we get a palindrome (79844897).

The spelling of 28104715 in words is "twenty-eight million, one hundred four thousand, seven hundred fifteen".