28287318577 has 8 divisors (see below), whose sum is σ = 32661646976. Its totient is φ = 23996310912.

The previous prime is 28287318529. The next prime is 28287318593. The reversal of 28287318577 is 77581378282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28287318577 - 2¹⁵ = 28287285809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28287318077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20829453 + ... + 20830810.

It is an arithmetic number, because the mean of its divisors is an integer number (4082705872).

Almost surely, 2^28287318577 is an apocalyptic number.

It is an amenable number.

28287318577 is a deficient number, since it is larger than the sum of its proper divisors (4374328399).

28287318577 is an equidigital number, since it uses as much as digits as its factorization.

28287318577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41660367.

The product of its digits is 10536960, while the sum is 58.

The spelling of 28287318577 in words is "twenty-eight billion, two hundred eighty-seven million, three hundred eighteen thousand, five hundred seventy-seven".