28248893 has 4 divisors (see below), whose sum is σ = 28905888. Its totient is φ = 27591900.

The previous prime is 28248887. The next prime is 28248907. The reversal of 28248893 is 39884282.

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 28248893 - 2⁸ = 28248637 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 (28248863) 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, 328433 + ... + 328518.

It is an arithmetic number, because the mean of its divisors is an integer number (7226472).

Almost surely, 2^28248893 is an apocalyptic number.

It is an amenable number.

28248893 is a deficient number, since it is larger than the sum of its proper divisors (656995).

28248893 is an equidigital number, since it uses as much as digits as its factorization.

28248893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656994.

The product of its digits is 221184, while the sum is 44.

The square root of 28248893 is about 5314.9687675470. The cubic root of 28248893 is about 304.5559892479. Note that the first 3 decimals are identical.

The spelling of 28248893 in words is "twenty-eight million, two hundred forty-eight thousand, eight hundred ninety-three".