28276573 has 6 divisors (see below), whose sum is σ = 30619194. Its totient is φ = 26101296.

The previous prime is 28276571. The next prime is 28276609. The reversal of 28276573 is 37567282.

It can be written as a sum of positive squares in 3 ways, for example, as 3892729 + 24383844 = 1973^2 + 4938^2 .

It is not a de Polignac number, because 28276573 - 2¹ = 28276571 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 (28276571) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83490 + ... + 83827.

It is an arithmetic number, because the mean of its divisors is an integer number (5103199).

Almost surely, 2^28276573 is an apocalyptic number.

It is an amenable number.

28276573 is a deficient number, since it is larger than the sum of its proper divisors (2342621).

28276573 is a wasteful number, since it uses less digits than its factorization.

28276573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167343 (or 167330 counting only the distinct ones).

The product of its digits is 141120, while the sum is 40.

The square root of 28276573 is about 5317.5720963613. The cubic root of 28276573 is about 304.6554309952.

The spelling of 28276573 in words is "twenty-eight million, two hundred seventy-six thousand, five hundred seventy-three".