891887085 has 32 divisors (see below), whose sum is σ = 1591954560. Its totient is φ = 473760000.

The previous prime is 891887069. The next prime is 891887089. The reversal of 891887085 is 580788198.

It is not a de Polignac number, because 891887085 - 2⁴ = 891887069 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891887089) 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 31 ways as a sum of consecutive naturals, for example, 20725 + ... + 47045.

It is an arithmetic number, because the mean of its divisors is an integer number (49748580).

Almost surely, 2^891887085 is an apocalyptic number.

It is an amenable number.

891887085 is a deficient number, since it is larger than the sum of its proper divisors (700067475).

891887085 is a wasteful number, since it uses less digits than its factorization.

891887085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26586 (or 26580 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 54.

The square root of 891887085 is about 29864.4786493922. The cubic root of 891887085 is about 962.5795371389.

The spelling of 891887085 in words is "eight hundred ninety-one million, eight hundred eighty-seven thousand, eighty-five".