849728881 has 4 divisors (see below), whose sum is σ = 849787200. Its totient is φ = 849670564.

The previous prime is 849728863. The next prime is 849728903. The reversal of 849728881 is 188827948.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 849728881 - 2¹³ = 849720689 is a prime.

It is a super-2 number, since 2×849728881² = 1444078342411024322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (849728281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13500 + ... + 43378.

It is an arithmetic number, because the mean of its divisors is an integer number (212446800).

Almost surely, 2^849728881 is an apocalyptic number.

It is an amenable number.

849728881 is a deficient number, since it is larger than the sum of its proper divisors (58319).

849728881 is a wasteful number, since it uses less digits than its factorization.

849728881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58318.

The product of its digits is 2064384, while the sum is 55.

The square root of 849728881 is about 29150.1094509094. The cubic root of 849728881 is about 947.1675118025.

The spelling of 849728881 in words is "eight hundred forty-nine million, seven hundred twenty-eight thousand, eight hundred eighty-one".