28584915 has 8 divisors (see below), whose sum is σ = 45735888. Its totient is φ = 15245280.

The previous prime is 28584877. The next prime is 28584917. The reversal of 28584915 is 51948582.

It is a happy number.

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

It is not a de Polignac number, because 28584915 - 2⁸ = 28584659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28584917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 952816 + ... + 952845.

It is an arithmetic number, because the mean of its divisors is an integer number (5716986).

Almost surely, 2^28584915 is an apocalyptic number.

28584915 is a deficient number, since it is larger than the sum of its proper divisors (17150973).

28584915 is a wasteful number, since it uses less digits than its factorization.

28584915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1905669.

The product of its digits is 115200, while the sum is 42.

The square root of 28584915 is about 5346.4862292912. The cubic root of 28584915 is about 305.7588021990.

The spelling of 28584915 in words is "twenty-eight million, five hundred eighty-four thousand, nine hundred fifteen".