891322012 has 12 divisors (see below), whose sum is σ = 1782644080. Its totient is φ = 381995136.

The previous prime is 891322009. The next prime is 891322021. The reversal of 891322012 is 210223198.

891322012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

891322012 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 31832929 = 891322012 / (8 + 9 + 1 + 3 + 2 + 2 + 0 + 1 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15916437 + ... + 15916492.

Almost surely, 2^891322012 is an apocalyptic number.

It is an amenable number.

891322012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

891322012 is a wasteful number, since it uses less digits than its factorization.

891322012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31832940 (or 31832938 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 891322012 is about 29855.0165298899. The cubic root of 891322012 is about 962.3762069833.

The spelling of 891322012 in words is "eight hundred ninety-one million, three hundred twenty-two thousand, twelve".