991152 has 30 divisors (see below), whose sum is σ = 2774252. Its totient is φ = 330336.

The previous prime is 991147. The next prime is 991171. The reversal of 991152 is 251199.

It is a happy number.

It is an unprimeable number.

991152 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3298 + ... + 3585.

2⁹⁹¹¹⁵² is an apocalyptic number.

It is an amenable number.

991152 is an abundant number, since it is smaller than the sum of its proper divisors (1783100).

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

991152 is a wasteful number, since it uses less digits than its factorization.

991152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6897 (or 6888 counting only the distinct ones).

The product of its digits is 810, while the sum is 27.

The square root of 991152 is about 995.5661705783. The cubic root of 991152 is about 99.7041925087.

The spelling of 991152 in words is "nine hundred ninety-one thousand, one hundred fifty-two".