28403042 has 16 divisors (see below), whose sum is σ = 43607040. Its totient is φ = 13871088.

The previous prime is 28403033. The next prime is 28403047. The reversal of 28403042 is 24030482.

It is a junction number, because it is equal to n+sod(n) for n = 28402999 and 28403017.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16184 + ... + 17852.

It is an arithmetic number, because the mean of its divisors is an integer number (2725440).

Almost surely, 2^28403042 is an apocalyptic number.

28403042 is a deficient number, since it is larger than the sum of its proper divisors (15203998).

28403042 is a wasteful number, since it uses less digits than its factorization.

28403042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 28403042 is about 5329.4504407115. The cubic root of 28403042 is about 305.1089532810.

The spelling of 28403042 in words is "twenty-eight million, four hundred three thousand, forty-two".