28448815 has 8 divisors (see below), whose sum is σ = 35623008. Its totient is φ = 21769440.

The previous prime is 28448809. The next prime is 28448851. The reversal of 28448815 is 51884482.

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

It is not a de Polignac number, because 28448815 - 2³ = 28448807 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 7 ways as a sum of consecutive naturals, for example, 123576 + ... + 123805.

It is an arithmetic number, because the mean of its divisors is an integer number (4452876).

Almost surely, 2^28448815 is an apocalyptic number.

28448815 is a deficient number, since it is larger than the sum of its proper divisors (7174193).

28448815 is a wasteful number, since it uses less digits than its factorization.

28448815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247409.

The product of its digits is 81920, while the sum is 40.

The square root of 28448815 is about 5333.7430571785. The cubic root of 28448815 is about 305.2727650381.

The spelling of 28448815 in words is "twenty-eight million, four hundred forty-eight thousand, eight hundred fifteen".