28473845 has 4 divisors (see below), whose sum is σ = 34168620. Its totient is φ = 22779072.

The previous prime is 28473833. The next prime is 28473889. The reversal of 28473845 is 54837482.

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 12545764 + 15928081 = 3542^2 + 3991^2 .

It is a cyclic number.

It is not a de Polignac number, because 28473845 - 2⁴ = 28473829 is a prime.

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, 2847380 + ... + 2847389.

It is an arithmetic number, because the mean of its divisors is an integer number (8542155).

Almost surely, 2^28473845 is an apocalyptic number.

It is an amenable number.

28473845 is a deficient number, since it is larger than the sum of its proper divisors (5694775).

28473845 is an equidigital number, since it uses as much as digits as its factorization.

28473845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5694774.

The product of its digits is 215040, while the sum is 41.

The square root of 28473845 is about 5336.0889235469. The cubic root of 28473845 is about 305.3622677408.

The spelling of 28473845 in words is "twenty-eight million, four hundred seventy-three thousand, eight hundred forty-five".