28394917353 has 12 divisors (see below), whose sum is σ = 44743506288. Its totient is φ = 17209040760.

The previous prime is 28394917303. The next prime is 28394917367. The reversal of 28394917353 is 35371949382.

28394917353 is a `hidden beast` number, since 2 + 8 + 39 + 491 + 73 + 53 = 666.

It is not a de Polignac number, because 28394917353 - 2⁹ = 28394916841 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

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 28394917353.

It is not an unprimeable number, because it can be changed into a prime (28394917303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143408575 + ... + 143408772.

It is an arithmetic number, because the mean of its divisors is an integer number (3728625524).

Almost surely, 2^28394917353 is an apocalyptic number.

It is an amenable number.

28394917353 is a deficient number, since it is larger than the sum of its proper divisors (16348588935).

28394917353 is a wasteful number, since it uses less digits than its factorization.

28394917353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286817364 (or 286817361 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The spelling of 28394917353 in words is "twenty-eight billion, three hundred ninety-four million, nine hundred seventeen thousand, three hundred fifty-three".