2191632 has 20 divisors (see below), whose sum is σ = 5661840. Its totient is φ = 730528.

The previous prime is 2191627. The next prime is 2191633. The reversal of 2191632 is 2361912.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (2191633) 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 3 ways as a sum of consecutive naturals, for example, 22782 + ... + 22877.

It is an arithmetic number, because the mean of its divisors is an integer number (283092).

2^2191632 is an apocalyptic number.

It is an amenable number.

2191632 is an abundant number, since it is smaller than the sum of its proper divisors (3470208).

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

2191632 is a wasteful number, since it uses less digits than its factorization.

2191632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45670 (or 45664 counting only the distinct ones).

The product of its digits is 648, while the sum is 24.

The square root of 2191632 is about 1480.4161577070. The cubic root of 2191632 is about 129.8940359393.

The spelling of 2191632 in words is "two million, one hundred ninety-one thousand, six hundred thirty-two".