28403043 has 16 divisors (see below), whose sum is σ = 40245120. Its totient is φ = 17767296.

The previous prime is 28403033. The next prime is 28403047. The reversal of 28403043 is 34030482.

It is not a de Polignac number, because 28403043 - 2⁹ = 28402531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28403047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3771 + ... + 8427.

It is an arithmetic number, because the mean of its divisors is an integer number (2515320).

Almost surely, 2^28403043 is an apocalyptic number.

28403043 is a deficient number, since it is larger than the sum of its proper divisors (11842077).

28403043 is a wasteful number, since it uses less digits than its factorization.

28403043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4786.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 28403043 is about 5329.4505345298. The cubic root of 28403043 is about 305.1089568618.

The spelling of 28403043 in words is "twenty-eight million, four hundred three thousand, forty-three".