28758056085861 has 8 divisors (see below), whose sum is σ = 39666284256480. Its totient is φ = 18510932652912.

The previous prime is 28758056085853. The next prime is 28758056085907. The reversal of 28758056085861 is 16858065085782.

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

It is not a de Polignac number, because 28758056085861 - 2³ = 28758056085853 is a prime.

It is a super-2 number, since 2×28758056085861² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28758056085821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165276184315 + ... + 165276184488.

It is an arithmetic number, because the mean of its divisors is an integer number (4958285532060).

Almost surely, 2^{28758056085861} is an apocalyptic number.

It is an amenable number.

28758056085861 is a deficient number, since it is larger than the sum of its proper divisors (10908228170619).

28758056085861 is a wasteful number, since it uses less digits than its factorization.

28758056085861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330552368835.

The product of its (nonzero) digits is 258048000, while the sum is 69.

The spelling of 28758056085861 in words is "twenty-eight trillion, seven hundred fifty-eight billion, fifty-six million, eighty-five thousand, eight hundred sixty-one".