849189405 has 16 divisors (see below), whose sum is σ = 1395425664. Its totient is φ = 440660160.

The previous prime is 849189403. The next prime is 849189409. The reversal of 849189405 is 504981948.

It is not a de Polignac number, because 849189405 - 2¹ = 849189403 is a prime.

It is a super-2 number, since 2×849189405² = 1442245291128508050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (849189403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 764481 + ... + 765590.

It is an arithmetic number, because the mean of its divisors is an integer number (87214104).

Almost surely, 2^849189405 is an apocalyptic number.

It is an amenable number.

849189405 is a deficient number, since it is larger than the sum of its proper divisors (546236259).

849189405 is a wasteful number, since it uses less digits than its factorization.

849189405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530116.

The product of its (nonzero) digits is 414720, while the sum is 48.

The square root of 849189405 is about 29140.8545688008. The cubic root of 849189405 is about 946.9670234169.

The spelling of 849189405 in words is "eight hundred forty-nine million, one hundred eighty-nine thousand, four hundred five".