2091388 has 24 divisors (see below), whose sum is σ = 4051712. Its totient is φ = 938304.

The previous prime is 2091379. The next prime is 2091389. The reversal of 2091388 is 8831902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1381 + ... + 2467.

2^2091388 is an apocalyptic number.

It is an amenable number.

2091388 is a deficient number, since it is larger than the sum of its proper divisors (1960324).

2091388 is a wasteful number, since it uses less digits than its factorization.

2091388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141 (or 1139 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 2091388 is about 1446.1631996424. The cubic root of 2091388 is about 127.8826235180.

It can be divided in two parts, 209 and 1388, that multiplied together give a palindrome (290092).

The spelling of 2091388 in words is "two million, ninety-one thousand, three hundred eighty-eight".