891770912 has 18 divisors (see below), whose sum is σ = 1756006623. Its totient is φ = 445800992.

The previous prime is 891770911. The next prime is 891770933. The reversal of 891770912 is 219077198.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 445885456 + 445885456 = 21116^2 + 21116^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=21116.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (891770911) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 166289 + ... + 171567.

Almost surely, 2^891770912 is an apocalyptic number.

It is an amenable number.

891770912 is a deficient number, since it is larger than the sum of its proper divisors (864235711).

891770912 is an frugal number, since it uses more digits than its factorization.

891770912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10568 (or 5281 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 44.

The square root of 891770912 is about 29862.5335830703. The cubic root of 891770912 is about 962.5377416358.

The spelling of 891770912 in words is "eight hundred ninety-one million, seven hundred seventy thousand, nine hundred twelve".