28315849 has 4 divisors (see below), whose sum is σ = 28335636. Its totient is φ = 28296064.

The previous prime is 28315817. The next prime is 28315853. The reversal of 28315849 is 94851382.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9653449 + 18662400 = 3107^2 + 4320^2 .

It is a cyclic number.

It is not a de Polignac number, because 28315849 - 2⁵ = 28315817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28313849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7564 + ... + 10669.

It is an arithmetic number, because the mean of its divisors is an integer number (7083909).

Almost surely, 2^28315849 is an apocalyptic number.

It is an amenable number.

28315849 is a deficient number, since it is larger than the sum of its proper divisors (19787).

28315849 is a wasteful number, since it uses less digits than its factorization.

28315849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19786.

The product of its digits is 69120, while the sum is 40.

The square root of 28315849 is about 5321.2638536348. The cubic root of 28315849 is about 304.7964206277.

The spelling of 28315849 in words is "twenty-eight million, three hundred fifteen thousand, eight hundred forty-nine".