28782948285 has 384 divisors, whose sum is σ = 70044549120. Its totient is φ = 10576355328.

The previous prime is 28782948263. The next prime is 28782948331. The reversal of 28782948285 is 58284928782.

28782948285 is a `hidden beast` number, since 2 + 8 + 78 + 2 + 9 + 482 + 85 = 666.

It is not a de Polignac number, because 28782948285 - 2⁶ = 28782948221 is a prime.

It is a super-2 number, since 2×28782948285² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 62165964 + ... + 62166426.

It is an arithmetic number, because the mean of its divisors is an integer number (182407680).

Almost surely, 2^28782948285 is an apocalyptic number.

It is an amenable number.

28782948285 is an abundant number, since it is smaller than the sum of its proper divisors (41261600835).

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

28782948285 is a wasteful number, since it uses less digits than its factorization.

28782948285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577 (or 574 counting only the distinct ones).

The product of its digits is 41287680, while the sum is 63.

The spelling of 28782948285 in words is "twenty-eight billion, seven hundred eighty-two million, nine hundred forty-eight thousand, two hundred eighty-five".