28781635774 has 8 divisors (see below), whose sum is σ = 43657537680. Its totient is φ = 14229123216.

The previous prime is 28781635723. The next prime is 28781635789. The reversal of 28781635774 is 47753618782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 80847114 + ... + 80847469.

It is an arithmetic number, because the mean of its divisors is an integer number (5457192210).

Almost surely, 2^28781635774 is an apocalyptic number.

28781635774 is a deficient number, since it is larger than the sum of its proper divisors (14875901906).

28781635774 is a wasteful number, since it uses less digits than its factorization.

28781635774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161694674.

The product of its digits is 15805440, while the sum is 58.

The spelling of 28781635774 in words is "twenty-eight billion, seven hundred eighty-one million, six hundred thirty-five thousand, seven hundred seventy-four".