28974005 has 4 divisors (see below), whose sum is σ = 34768812. Its totient is φ = 23179200.

The previous prime is 28973983. The next prime is 28974007. The reversal of 28974005 is 50047982.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50047982 = 2 ⋅25023991.

It can be written as a sum of positive squares in 2 ways, for example, as 3713329 + 25260676 = 1927^2 + 5026^2 .

It is not a de Polignac number, because 28974005 - 2⁶ = 28973941 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 (28974007) 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, 2897396 + ... + 2897405.

It is an arithmetic number, because the mean of its divisors is an integer number (8692203).

Almost surely, 2^28974005 is an apocalyptic number.

It is an amenable number.

28974005 is a deficient number, since it is larger than the sum of its proper divisors (5794807).

28974005 is an equidigital number, since it uses as much as digits as its factorization.

28974005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5794806.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 28974005 is about 5382.7506908643. The cubic root of 28974005 is about 307.1398564182.

The spelling of 28974005 in words is "twenty-eight million, nine hundred seventy-four thousand, five".