28842817 has 12 divisors (see below), whose sum is σ = 30761940. Its totient is φ = 27037152.

The previous prime is 28842797. The next prime is 28842833. The reversal of 28842817 is 71824882.

It can be written as a sum of positive squares in 2 ways, for example, as 25160256 + 3682561 = 5016^2 + 1919^2 .

It is not a de Polignac number, because 28842817 - 2¹¹ = 28840769 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28842817.

It is not an unprimeable number, because it can be changed into a prime (28842857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38983 + ... + 39715.

It is an arithmetic number, because the mean of its divisors is an integer number (2563495).

Almost surely, 2^28842817 is an apocalyptic number.

It is an amenable number.

28842817 is a deficient number, since it is larger than the sum of its proper divisors (1919123).

28842817 is a wasteful number, since it uses less digits than its factorization.

28842817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880 (or 861 counting only the distinct ones).

The product of its digits is 57344, while the sum is 40.

The square root of 28842817 is about 5370.5509028404. The cubic root of 28842817 is about 306.6756008477.

The spelling of 28842817 in words is "twenty-eight million, eight hundred forty-two thousand, eight hundred seventeen".