28640474286 has 16 divisors (see below), whose sum is σ = 57283003344. Its totient is φ = 9546482304.

The previous prime is 28640474281. The next prime is 28640474293. The reversal of 28640474286 is 68247404682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28640474281) 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, 142230 + ... + 278406.

It is an arithmetic number, because the mean of its divisors is an integer number (3580187709).

Almost surely, 2^28640474286 is an apocalyptic number.

28640474286 is an abundant number, since it is smaller than the sum of its proper divisors (28642529058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28640474286 is a wasteful number, since it uses less digits than its factorization.

28640474286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171235.

The product of its (nonzero) digits is 4128768, while the sum is 51.

The spelling of 28640474286 in words is "twenty-eight billion, six hundred forty million, four hundred seventy-four thousand, two hundred eighty-six".