891642912 has 24 divisors (see below), whose sum is σ = 2340562896. Its totient is φ = 297214272.

The previous prime is 891642889. The next prime is 891642923. The reversal of 891642912 is 219246198.

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4643878 + ... + 4644069.

It is an arithmetic number, because the mean of its divisors is an integer number (97523454).

Almost surely, 2^891642912 is an apocalyptic number.

It is an amenable number.

891642912 is an abundant number, since it is smaller than the sum of its proper divisors (1448919984).

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

891642912 is a wasteful number, since it uses less digits than its factorization.

891642912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9287960 (or 9287952 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 891642912 is about 29860.3903524385. The cubic root of 891642912 is about 962.4916869356.

The spelling of 891642912 in words is "eight hundred ninety-one million, six hundred forty-two thousand, nine hundred twelve".