2858728581 has 48 divisors (see below), whose sum is σ = 4682096640. Its totient is φ = 1671230880.

The previous prime is 2858728573. The next prime is 2858728591. The reversal of 2858728581 is 1858278582.

2858728581 is a `hidden beast` number, since 2 + 8 + 58 + 7 + 2 + 8 + 581 = 666.

It is not a de Polignac number, because 2858728581 - 2³ = 2858728573 is a prime.

It is a super-2 number, since 2×2858728581² = 16344658199652547122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2858728501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 110200 + ... + 133646.

It is an arithmetic number, because the mean of its divisors is an integer number (97543680).

Almost surely, 2^2858728581 is an apocalyptic number.

It is an amenable number.

2858728581 is a deficient number, since it is larger than the sum of its proper divisors (1823368059).

2858728581 is a wasteful number, since it uses less digits than its factorization.

2858728581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23526 (or 23523 counting only the distinct ones).

The product of its digits is 2867200, while the sum is 54.

The square root of 2858728581 is about 53467.0794134110. The cubic root of 2858728581 is about 1419.2458769358.

The spelling of 2858728581 in words is "two billion, eight hundred fifty-eight million, seven hundred twenty-eight thousand, five hundred eighty-one".