1881988 has 12 divisors (see below), whose sum is σ = 3466960. Its totient is φ = 891432.

The previous prime is 1881983. The next prime is 1881989. The reversal of 1881988 is 8891881.

It is not an unprimeable number, because it can be changed into a prime (1881983) 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 3 ways as a sum of consecutive naturals, for example, 12306 + ... + 12457.

2^1881988 is an apocalyptic number.

It is an amenable number.

1881988 is a deficient number, since it is larger than the sum of its proper divisors (1584972).

1881988 is a wasteful number, since it uses less digits than its factorization.

1881988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24786 (or 24784 counting only the distinct ones).

The product of its digits is 36864, while the sum is 43.

The square root of 1881988 is about 1371.8556775405. The cubic root of 1881988 is about 123.4636039329.

The spelling of 1881988 in words is "one million, eight hundred eighty-one thousand, nine hundred eighty-eight".