28578793 has 4 divisors (see below), whose sum is σ = 30082960. Its totient is φ = 27074628.

The previous prime is 28578791. The next prime is 28578821. The reversal of 28578793 is 39787582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28578793 - 2¹ = 28578791 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28578791) 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 3 ways as a sum of consecutive naturals, for example, 752055 + ... + 752092.

It is an arithmetic number, because the mean of its divisors is an integer number (7520740).

Almost surely, 2^28578793 is an apocalyptic number.

It is an amenable number.

28578793 is a deficient number, since it is larger than the sum of its proper divisors (1504167).

28578793 is a wasteful number, since it uses less digits than its factorization.

28578793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504166.

The product of its digits is 846720, while the sum is 49.

The square root of 28578793 is about 5345.9136730778. The cubic root of 28578793 is about 305.7369726310.

The spelling of 28578793 in words is "twenty-eight million, five hundred seventy-eight thousand, seven hundred ninety-three".