28113519 has 16 divisors (see below), whose sum is σ = 43117568. Its totient is φ = 15960672.

The previous prime is 28113457. The next prime is 28113523. The reversal of 28113519 is 91531182.

It is not a de Polignac number, because 28113519 - 2⁸ = 28113263 is a prime.

It is a super-2 number, since 2×28113519² = 1580739901126722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28113539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 967 + ... + 7560.

It is an arithmetic number, because the mean of its divisors is an integer number (2694848).

Almost surely, 2^28113519 is an apocalyptic number.

28113519 is a deficient number, since it is larger than the sum of its proper divisors (15004049).

28113519 is a wasteful number, since it uses less digits than its factorization.

28113519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8694.

The product of its digits is 2160, while the sum is 30.

The square root of 28113519 is about 5302.2183093494. The cubic root of 28113519 is about 304.0687135475.

The spelling of 28113519 in words is "twenty-eight million, one hundred thirteen thousand, five hundred nineteen".