1881588 has 12 divisors (see below), whose sum is σ = 4390400. Its totient is φ = 627192.

The previous prime is 1881587. The next prime is 1881601. The reversal of 1881588 is 8851881.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78388 + ... + 78411.

2^1881588 is an apocalyptic number.

It is an amenable number.

1881588 is an abundant number, since it is smaller than the sum of its proper divisors (2508812).

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

1881588 is a wasteful number, since it uses less digits than its factorization.

1881588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156806 (or 156804 counting only the distinct ones).

The product of its digits is 20480, while the sum is 39.

The square root of 1881588 is about 1371.7098818628. The cubic root of 1881588 is about 123.4548562787.

The spelling of 1881588 in words is "one million, eight hundred eighty-one thousand, five hundred eighty-eight".