28433185 has 12 divisors (see below), whose sum is σ = 37504404. Its totient is φ = 20678240.

The previous prime is 28433183. The next prime is 28433203. The reversal of 28433185 is 58133482.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11778624 + 16654561 = 3432^2 + 4081^2 .

It is not a de Polignac number, because 28433185 - 2¹ = 28433183 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28433185.

It is not an unprimeable number, because it can be changed into a prime (28433183) 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 11 ways as a sum of consecutive naturals, for example, 22894 + ... + 24103.

It is an arithmetic number, because the mean of its divisors is an integer number (3125367).

Almost surely, 2^28433185 is an apocalyptic number.

It is an amenable number.

28433185 is a deficient number, since it is larger than the sum of its proper divisors (9071219).

28433185 is a wasteful number, since it uses less digits than its factorization.

28433185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47024 (or 47013 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 28433185 is about 5332.2776559365. The cubic root of 28433185 is about 305.2168483868.

The spelling of 28433185 in words is "twenty-eight million, four hundred thirty-three thousand, one hundred eighty-five".