891140852 has 18 divisors (see below), whose sum is σ = 1814108562. Its totient is φ = 381917424.

The previous prime is 891140837. The next prime is 891140879. The reversal of 891140852 is 258041198.

It can be written as a sum of positive squares in only one way, i.e., 890067556 + 1073296 = 29834^2 + 1036^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2273123 + ... + 2273514.

It is an arithmetic number, because the mean of its divisors is an integer number (100783809).

Almost surely, 2^891140852 is an apocalyptic number.

It is an amenable number.

891140852 is an abundant number, since it is smaller than the sum of its proper divisors (922967710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

891140852 is a wasteful number, since it uses less digits than its factorization.

891140852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4546655 (or 4546646 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 891140852 is about 29851.9823797349. The cubic root of 891140852 is about 962.3110020089.

The spelling of 891140852 in words is "eight hundred ninety-one million, one hundred forty thousand, eight hundred fifty-two".