1981882 has 16 divisors (see below), whose sum is σ = 3462912. Its totient is φ = 833040.

The previous prime is 1981879. The next prime is 1981883. The reversal of 1981882 is 2881891.

It is not an unprimeable number, because it can be changed into a prime (1981883) 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, 594 + ... + 2077.

It is an arithmetic number, because the mean of its divisors is an integer number (216432).

2^1981882 is an apocalyptic number.

1981882 is a deficient number, since it is larger than the sum of its proper divisors (1481030).

1981882 is a wasteful number, since it uses less digits than its factorization.

1981882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2733.

The product of its digits is 9216, while the sum is 37.

The square root of 1981882 is about 1407.7933086927. The cubic root of 1981882 is about 125.6104961680.

Subtracting 1981882 from its reverse (2881891), we obtain a palindrome (900009).

It can be divided in two parts, 19818 and 82, that added together give a triangular number (19900 = T₁₉₉).

The spelling of 1981882 in words is "one million, nine hundred eighty-one thousand, eight hundred eighty-two".