28287334573 has 6 divisors (see below), whose sum is σ = 28691364302. Its totient is φ = 27888916440.

The previous prime is 28287334513. The next prime is 28287334661. The reversal of 28287334573 is 37543378282.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17571358249 + 10715976324 = 132557^2 + 103518^2 .

It is a de Polignac number, because none of the positive numbers 2^k-28287334573 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 28287334573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28287334513) 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, 2800686 + ... + 2810767.

Almost surely, 2^28287334573 is an apocalyptic number.

It is an amenable number.

28287334573 is a deficient number, since it is larger than the sum of its proper divisors (404029729).

28287334573 is an frugal number, since it uses more digits than its factorization.

28287334573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5611595 (or 5611524 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 52.

The spelling of 28287334573 in words is "twenty-eight billion, two hundred eighty-seven million, three hundred thirty-four thousand, five hundred seventy-three".