28334293 has 12 divisors (see below), whose sum is σ = 31013220. Its totient is φ = 25733376.

The previous prime is 28334281. The next prime is 28334311. The reversal of 28334293 is 39243382.

It can be written as a sum of positive squares in 6 ways, for example, as 381924 + 27952369 = 618^2 + 5287^2 .

It is a de Polignac number, because none of the positive numbers 2^k-28334293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28334213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69073 + ... + 69481.

It is an arithmetic number, because the mean of its divisors is an integer number (2584435).

Almost surely, 2^28334293 is an apocalyptic number.

It is an amenable number.

28334293 is a deficient number, since it is larger than the sum of its proper divisors (2678927).

28334293 is an equidigital number, since it uses as much as digits as its factorization.

28334293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568 (or 495 counting only the distinct ones).

The product of its digits is 31104, while the sum is 34.

The square root of 28334293 is about 5322.9966184472. The cubic root of 28334293 is about 304.8625843397.

The spelling of 28334293 in words is "twenty-eight million, three hundred thirty-four thousand, two hundred ninety-three".