28287146657 has 16 divisors (see below), whose sum is σ = 35296282752. Its totient is φ = 22023688320.

The previous prime is 28287146639. The next prime is 28287146677. The reversal of 28287146657 is 75664178282.

It is a cyclic number.

It is not a de Polignac number, because 28287146657 - 2¹⁴ = 28287130273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28287146677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58028 + ... + 244829.

It is an arithmetic number, because the mean of its divisors is an integer number (2206017672).

Almost surely, 2^28287146657 is an apocalyptic number.

It is an amenable number.

28287146657 is a deficient number, since it is larger than the sum of its proper divisors (7009136095).

28287146657 is a wasteful number, since it uses less digits than its factorization.

28287146657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304088.

The product of its digits is 9031680, while the sum is 56.

The spelling of 28287146657 in words is "twenty-eight billion, two hundred eighty-seven million, one hundred forty-six thousand, six hundred fifty-seven".