28842845 has 4 divisors (see below), whose sum is σ = 34611420. Its totient is φ = 23074272.

The previous prime is 28842841. The next prime is 28842857. The reversal of 28842845 is 54824882.

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 13741849 + 15100996 = 3707^2 + 3886^2 .

It is a cyclic number.

It is not a de Polignac number, because 28842845 - 2² = 28842841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28842841) 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, 2884280 + ... + 2884289.

It is an arithmetic number, because the mean of its divisors is an integer number (8652855).

Almost surely, 2^28842845 is an apocalyptic number.

It is an amenable number.

28842845 is a deficient number, since it is larger than the sum of its proper divisors (5768575).

28842845 is an equidigital number, since it uses as much as digits as its factorization.

28842845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5768574.

The product of its digits is 163840, while the sum is 41.

The square root of 28842845 is about 5370.5535096487. The cubic root of 28842845 is about 306.6757000857.

The spelling of 28842845 in words is "twenty-eight million, eight hundred forty-two thousand, eight hundred forty-five".