991496 has 32 divisors (see below), whose sum is σ = 2138400. Its totient is φ = 426240.

The previous prime is 991493. The next prime is 991499. The reversal of 991496 is 694199.

It is an interprime number because it is at equal distance from previous prime (991493) and next prime (991499).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 991496.

It is not an unprimeable number, because it can be changed into a prime (991493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1376 + ... + 1968.

It is an arithmetic number, because the mean of its divisors is an integer number (66825).

2⁹⁹¹⁴⁹⁶ 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 991496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1069200).

991496 is an abundant number, since it is smaller than the sum of its proper divisors (1146904).

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

991496 is a wasteful number, since it uses less digits than its factorization.

991496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629 (or 625 counting only the distinct ones).

The product of its digits is 17496, while the sum is 38.

The square root of 991496 is about 995.7389216055. The cubic root of 991496 is about 99.7157259819.

It can be divided in two parts, 991 and 496, that multiplied together give a triangular number (491536 = T₉₉₁).

The spelling of 991496 in words is "nine hundred ninety-one thousand, four hundred ninety-six".