891700992 has 216 divisors, whose sum is σ = 3165044064. Its totient is φ = 235118592.

The previous prime is 891700969. The next prime is 891701003. The reversal of 891700992 is 299007198.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 207538 + ... + 211790.

Almost surely, 2^891700992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 891700992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1582522032).

891700992 is an abundant number, since it is smaller than the sum of its proper divisors (2273343072).

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

891700992 is a wasteful number, since it uses less digits than its factorization.

891700992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4295 (or 4278 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 891700992 is about 29861.3628624013. The cubic root of 891700992 is about 962.5125848020.

The spelling of 891700992 in words is "eight hundred ninety-one million, seven hundred thousand, nine hundred ninety-two".