28243594 has 8 divisors (see below), whose sum is σ = 43164900. Its totient is φ = 13855296.

The previous prime is 28243583. The next prime is 28243597. The reversal of 28243594 is 49534282.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28227969 + 15625 = 5313^2 + 125^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28243597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133119 + ... + 133330.

Almost surely, 2^28243594 is an apocalyptic number.

28243594 is a deficient number, since it is larger than the sum of its proper divisors (14921306).

28243594 is a wasteful number, since it uses less digits than its factorization.

28243594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266504.

The product of its digits is 69120, while the sum is 37.

The square root of 28243594 is about 5314.4702464121. The cubic root of 28243594 is about 304.5369449251.

The spelling of 28243594 in words is "twenty-eight million, two hundred forty-three thousand, five hundred ninety-four".