2091328 has 28 divisors (see below), whose sum is σ = 4256532. Its totient is φ = 1018880.

The previous prime is 2091319. The next prime is 2091337. The reversal of 2091328 is 8231902.

It is an interprime number because it is at equal distance from previous prime (2091319) and next prime (2091337).

It can be written as a sum of positive squares in 2 ways, for example, as 473344 + 1617984 = 688^2 + 1272^2 .

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 3 ways as a sum of consecutive naturals, for example, 2226 + ... + 3022.

It is an arithmetic number, because the mean of its divisors is an integer number (152019).

2^2091328 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 2091328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2128266).

2091328 is an abundant number, since it is smaller than the sum of its proper divisors (2165204).

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

2091328 is an equidigital number, since it uses as much as digits as its factorization.

2091328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850 (or 840 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 2091328 is about 1446.1424549470. The cubic root of 2091328 is about 127.8814005613.

The spelling of 2091328 in words is "two million, ninety-one thousand, three hundred twenty-eight".