28813043 has 24 divisors (see below), whose sum is σ = 35675136. Its totient is φ = 22770000.

The previous prime is 28813003. The next prime is 28813049. The reversal of 28813043 is 34031882.

It is a happy number.

It is not a de Polignac number, because 28813043 - 2⁸ = 28812787 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28812997 and 28813015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28813049) 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 23 ways as a sum of consecutive naturals, for example, 114668 + ... + 114918.

It is an arithmetic number, because the mean of its divisors is an integer number (1486464).

Almost surely, 2^28813043 is an apocalyptic number.

28813043 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28813043 is a deficient number, since it is larger than the sum of its proper divisors (6862093).

28813043 is a wasteful number, since it uses less digits than its factorization.

28813043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 28813043 is about 5367.7782182203. The cubic root of 28813043 is about 306.5700390012.

It can be divided in two parts, 288 and 13043, that added together give a palindrome (13331).

The spelling of 28813043 in words is "twenty-eight million, eight hundred thirteen thousand, forty-three".