28985223069 has 12 divisors (see below), whose sum is σ = 45673684992. Its totient is φ = 17566801800.

The previous prime is 28985223037. The next prime is 28985223073. The reversal of 28985223069 is 96032258982.

28985223069 is a `hidden beast` number, since 2 + 89 + 8 + 522 + 30 + 6 + 9 = 666.

It is not a de Polignac number, because 28985223069 - 2⁵ = 28985223037 is a prime.

It is a super-2 number, since 2×28985223069² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28985323069) 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, 146389917 + ... + 146390114.

It is an arithmetic number, because the mean of its divisors is an integer number (3806140416).

Almost surely, 2^28985223069 is an apocalyptic number.

It is an amenable number.

28985223069 is a deficient number, since it is larger than the sum of its proper divisors (16688461923).

28985223069 is a wasteful number, since it uses less digits than its factorization.

28985223069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292780048 (or 292780045 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 28985223069 in words is "twenty-eight billion, nine hundred eighty-five million, two hundred twenty-three thousand, sixty-nine".