889005861 has 20 divisors (see below), whose sum is σ = 1333560844. Its totient is φ = 590198400.

The previous prime is 889005857. The next prime is 889005863. The reversal of 889005861 is 168500988.

It can be written as a sum of positive squares in 2 ways, for example, as 335109636 + 553896225 = 18306^2 + 23535^2 .

It is not a de Polignac number, because 889005861 - 2² = 889005857 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (889005863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3250 + ... + 42291.

Almost surely, 2^889005861 is an apocalyptic number.

889005861 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

889005861 is a deficient number, since it is larger than the sum of its proper divisors (444554983).

889005861 is a wasteful number, since it uses less digits than its factorization.

889005861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45794 (or 45785 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 889005861 is about 29816.2013174046. The cubic root of 889005861 is about 961.5418874326.

The spelling of 889005861 in words is "eight hundred eighty-nine million, five thousand, eight hundred sixty-one".