28942433 has 12 divisors (see below), whose sum is σ = 32112108. Its totient is φ = 26058240.

The previous prime is 28942429. The next prime is 28942439. The reversal of 28942433 is 33424982.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4804864 + 24137569 = 2192^2 + 4913^2 .

It is not a de Polignac number, because 28942433 - 2² = 28942429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28942393 and 28942402.

It is not an unprimeable number, because it can be changed into a prime (28942439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4841 + ... + 9017.

It is an arithmetic number, because the mean of its divisors is an integer number (2676009).

Almost surely, 2^28942433 is an apocalyptic number.

It is an amenable number.

28942433 is a deficient number, since it is larger than the sum of its proper divisors (3169675).

28942433 is a wasteful number, since it uses less digits than its factorization.

28942433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4244 (or 4231 counting only the distinct ones).

The product of its digits is 41472, while the sum is 35.

The square root of 28942433 is about 5379.8171902027. The cubic root of 28942433 is about 307.0282558777.

The spelling of 28942433 in words is "twenty-eight million, nine hundred forty-two thousand, four hundred thirty-three".