28512851798 has 4 divisors (see below), whose sum is σ = 42769277700. Its totient is φ = 14256425898.

The previous prime is 28512851779. The next prime is 28512851831. The reversal of 28512851798 is 89715821582.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7128212948 + ... + 7128212951.

It is an arithmetic number, because the mean of its divisors is an integer number (10692319425).

Almost surely, 2^28512851798 is an apocalyptic number.

28512851798 is a deficient number, since it is larger than the sum of its proper divisors (14256425902).

28512851798 is a wasteful number, since it uses less digits than its factorization.

28512851798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14256425901.

The product of its digits is 3225600, while the sum is 56.

The spelling of 28512851798 in words is "twenty-eight billion, five hundred twelve million, eight hundred fifty-one thousand, seven hundred ninety-eight".