28269864693 has 48 divisors (see below), whose sum is σ = 47554730496. Its totient is φ = 15849108000.

The previous prime is 28269864629. The next prime is 28269864773. The reversal of 28269864693 is 39646896282.

28269864693 is a `hidden beast` number, since 2 + 82 + 6 + 98 + 6 + 469 + 3 = 666.

It is not a de Polignac number, because 28269864693 - 2⁶ = 28269864629 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28269864693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28269864793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1046130 + ... + 1072812.

It is an arithmetic number, because the mean of its divisors is an integer number (990723552).

Almost surely, 2^28269864693 is an apocalyptic number.

It is an amenable number.

28269864693 is a deficient number, since it is larger than the sum of its proper divisors (19284865803).

28269864693 is a wasteful number, since it uses less digits than its factorization.

28269864693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27014 (or 27011 counting only the distinct ones).

The product of its digits is 53747712, while the sum is 63.

The spelling of 28269864693 in words is "twenty-eight billion, two hundred sixty-nine million, eight hundred sixty-four thousand, six hundred ninety-three".