28293392 has 20 divisors (see below), whose sum is σ = 55307100. Its totient is φ = 14020608.

The previous prime is 28293347. The next prime is 28293407. The reversal of 28293392 is 29339282.

It can be written as a sum of positive squares in 2 ways, for example, as 2119936 + 26173456 = 1456^2 + 5116^2 .

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6017 + ... + 9632.

It is an arithmetic number, because the mean of its divisors is an integer number (2765355).

Almost surely, 2^28293392 is an apocalyptic number.

It is an amenable number.

28293392 is a deficient number, since it is larger than the sum of its proper divisors (27013708).

28293392 is a wasteful number, since it uses less digits than its factorization.

28293392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15770 (or 15764 counting only the distinct ones).

The product of its digits is 46656, while the sum is 38.

The square root of 28293392 is about 5319.1533160833. The cubic root of 28293392 is about 304.7158223788.

The spelling of 28293392 in words is "twenty-eight million, two hundred ninety-three thousand, three hundred ninety-two".