28573879361 has 4 divisors (see below), whose sum is σ = 30254695812. Its totient is φ = 26893062912.

The previous prime is 28573879351. The next prime is 28573879387. The reversal of 28573879361 is 16397837582.

It is a happy number.

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 15930226225 + 12643653136 = 126215^2 + 112444^2 .

It is a cyclic number.

It is not a de Polignac number, because 28573879361 - 2¹⁰ = 28573878337 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 28573879361.

It is not an unprimeable number, because it can be changed into a prime (28573879351) 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, 840408200 + ... + 840408233.

It is an arithmetic number, because the mean of its divisors is an integer number (7563673953).

Almost surely, 2^28573879361 is an apocalyptic number.

It is an amenable number.

28573879361 is a deficient number, since it is larger than the sum of its proper divisors (1680816451).

28573879361 is a wasteful number, since it uses less digits than its factorization.

28573879361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680816450.

The product of its digits is 15240960, while the sum is 59.

The spelling of 28573879361 in words is "twenty-eight billion, five hundred seventy-three million, eight hundred seventy-nine thousand, three hundred sixty-one".