28793005 has 4 divisors (see below), whose sum is σ = 34551612. Its totient is φ = 23034400.

The previous prime is 28792997. The next prime is 28793021. The reversal of 28793005 is 50039782.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6240004 + 22553001 = 2498^2 + 4749^2 .

It is not a de Polignac number, because 28793005 - 2³ = 28792997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2879296 + ... + 2879305.

It is an arithmetic number, because the mean of its divisors is an integer number (8637903).

Almost surely, 2^28793005 is an apocalyptic number.

It is an amenable number.

28793005 is a deficient number, since it is larger than the sum of its proper divisors (5758607).

28793005 is an equidigital number, since it uses as much as digits as its factorization.

28793005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5758606.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 28793005 is about 5365.9113857760. The cubic root of 28793005 is about 306.4989545847.

The spelling of 28793005 in words is "twenty-eight million, seven hundred ninety-three thousand, five".