891027285 has 32 divisors (see below), whose sum is σ = 1442593152. Its totient is φ = 469597440.

The previous prime is 891027271. The next prime is 891027289. The reversal of 891027285 is 582720198.

It is not a de Polignac number, because 891027285 - 2⁵ = 891027253 is a prime.

It is a super-2 number, since 2×891027285² = 1587859245228942450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891027289) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 543487 + ... + 545123.

It is an arithmetic number, because the mean of its divisors is an integer number (45081036).

Almost surely, 2^891027285 is an apocalyptic number.

It is an amenable number.

891027285 is a deficient number, since it is larger than the sum of its proper divisors (551565867).

891027285 is a wasteful number, since it uses less digits than its factorization.

891027285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2053.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 891027285 is about 29850.0801506462. The cubic root of 891027285 is about 962.2701212974.

The spelling of 891027285 in words is "eight hundred ninety-one million, twenty-seven thousand, two hundred eighty-five".