991276 has 24 divisors (see below), whose sum is σ = 2039184. Its totient is φ = 415680.

The previous prime is 991273. The next prime is 991313. The reversal of 991276 is 672199.

991276 = T₃₈₄ + T₃₈₅ + ... + T₃₉₆.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 991276.

It is not an unprimeable number, because it can be changed into a prime (991273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295 + ... + 1438.

It is an arithmetic number, because the mean of its divisors is an integer number (84966).

2⁹⁹¹²⁷⁶ is an apocalyptic number.

It is an amenable number.

991276 is an abundant number, since it is smaller than the sum of its proper divisors (1047908).

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

991276 is a wasteful number, since it uses less digits than its factorization.

991276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761 (or 1759 counting only the distinct ones).

The product of its digits is 6804, while the sum is 34.

The square root of 991276 is about 995.6284447524. The cubic root of 991276 is about 99.7083502310.

The spelling of 991276 in words is "nine hundred ninety-one thousand, two hundred seventy-six".