28116519 has 4 divisors (see below), whose sum is σ = 37488696. Its totient is φ = 18744344.

The previous prime is 28116467. The next prime is 28116527. The reversal of 28116519 is 91561182.

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

It is a cyclic number.

It is not a de Polignac number, because 28116519 - 2¹² = 28112423 is a prime.

It is a super-2 number, since 2×28116519² = 1581077281354722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28116519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28116619) 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, 4686084 + ... + 4686089.

It is an arithmetic number, because the mean of its divisors is an integer number (9372174).

Almost surely, 2^28116519 is an apocalyptic number.

28116519 is a deficient number, since it is larger than the sum of its proper divisors (9372177).

28116519 is an equidigital number, since it uses as much as digits as its factorization.

28116519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9372176.

The product of its digits is 4320, while the sum is 33.

The square root of 28116519 is about 5302.5012022629. The cubic root of 28116519 is about 304.0795289100.

The spelling of 28116519 in words is "twenty-eight million, one hundred sixteen thousand, five hundred nineteen".