28971854858 has 8 divisors (see below), whose sum is σ = 43498744740. Its totient is φ = 14472273280.

The previous prime is 28971854843. The next prime is 28971854867. The reversal of 28971854858 is 85845817982.

It can be written as a sum of positive squares in 2 ways, for example, as 23001665569 + 5970189289 = 151663^2 + 77267^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 28971854794 and 28971854803.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6824423 + ... + 6828666.

Almost surely, 2^28971854858 is an apocalyptic number.

28971854858 is a deficient number, since it is larger than the sum of its proper divisors (14526889882).

28971854858 is a wasteful number, since it uses less digits than its factorization.

28971854858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13654152.

The product of its digits is 51609600, while the sum is 65.

The spelling of 28971854858 in words is "twenty-eight billion, nine hundred seventy-one million, eight hundred fifty-four thousand, eight hundred fifty-eight".