28917686690 has 64 divisors (see below), whose sum is σ = 57750796800. Its totient is φ = 10380674304.

The previous prime is 28917686689. The next prime is 28917686711. The reversal of 28917686690 is 9668671982.

It is a super-2 number, since 2×28917686690² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 242519 + ... + 341541.

It is an arithmetic number, because the mean of its divisors is an integer number (902356200).

Almost surely, 2^28917686690 is an apocalyptic number.

28917686690 is a deficient number, since it is larger than the sum of its proper divisors (28833110110).

28917686690 is a wasteful number, since it uses less digits than its factorization.

28917686690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99131.

The product of its (nonzero) digits is 15676416, while the sum is 62.

The spelling of 28917686690 in words is "twenty-eight billion, nine hundred seventeen million, six hundred eighty-six thousand, six hundred ninety".