2091138 has 16 divisors (see below), whose sum is σ = 4779840. Its totient is φ = 597456.

The previous prime is 2091097. The next prime is 2091139. The reversal of 2091138 is 8311902.

It is not an unprimeable number, because it can be changed into a prime (2091139) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 24853 + ... + 24936.

It is an arithmetic number, because the mean of its divisors is an integer number (298740).

2^2091138 is an apocalyptic number.

2091138 is an abundant number, since it is smaller than the sum of its proper divisors (2688702).

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

2091138 is a wasteful number, since it uses less digits than its factorization.

2091138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49801.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 2091138 is about 1446.0767614480. The cubic root of 2091138 is about 127.8775277109.

The spelling of 2091138 in words is "two million, ninety-one thousand, one hundred thirty-eight".