28593394 has 8 divisors (see below), whose sum is σ = 43699500. Its totient is φ = 14026896.

The previous prime is 28593379. The next prime is 28593401. The reversal of 28593394 is 49339582.

It can be written as a sum of positive squares in 2 ways, for example, as 27300625 + 1292769 = 5225^2 + 1137^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28593394.

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, 134769 + ... + 134980.

Almost surely, 2^28593394 is an apocalyptic number.

28593394 is a deficient number, since it is larger than the sum of its proper divisors (15106106).

28593394 is a wasteful number, since it uses less digits than its factorization.

28593394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269804.

The product of its digits is 233280, while the sum is 43.

The square root of 28593394 is about 5347.2791211980. The cubic root of 28593394 is about 305.7890311104.

The spelling of 28593394 in words is "twenty-eight million, five hundred ninety-three thousand, three hundred ninety-four".