2491328 has 56 divisors (see below), whose sum is σ = 5803392. Its totient is φ = 1039104.

The previous prime is 2491327. The next prime is 2491331. The reversal of 2491328 is 8231942.

It is a tau number, because it is divible by the number of its divisors (56).

It is a self number, because there is not a number n which added to its sum of digits gives 2491328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491327) 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, 29975 + ... + 30057.

It is an arithmetic number, because the mean of its divisors is an integer number (103632).

2^2491328 is an apocalyptic number.

2491328 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2491328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2901696).

2491328 is an abundant number, since it is smaller than the sum of its proper divisors (3312064).

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

2491328 is an equidigital number, since it uses as much as digits as its factorization.

2491328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 159 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 2491328 is about 1578.3941206175. The cubic root of 2491328 is about 135.5637694964.

The spelling of 2491328 in words is "two million, four hundred ninety-one thousand, three hundred twenty-eight".