28282807 has 4 divisors (see below), whose sum is σ = 32323216. Its totient is φ = 24242400.

The previous prime is 28282741. The next prime is 28282817. The reversal of 28282807 is 70828282.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-28282807 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 (28282817) 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, 2020194 + ... + 2020207.

It is an arithmetic number, because the mean of its divisors is an integer number (8080804).

Almost surely, 2^28282807 is an apocalyptic number.

28282807 is a deficient number, since it is larger than the sum of its proper divisors (4040409).

28282807 is an equidigital number, since it uses as much as digits as its factorization.

28282807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4040408.

The product of its (nonzero) digits is 28672, while the sum is 37.

The square root of 28282807 is about 5318.1582338249. The cubic root of 28282807 is about 304.6778179891.

It can be divided in two parts, 28 and 282807, that multiplied together give a square (7918596 = 2814²).

The spelling of 28282807 in words is "twenty-eight million, two hundred eighty-two thousand, eight hundred seven".