1981883692 has 24 divisors (see below), whose sum is σ = 3768611840. Its totient is φ = 908502480.

The previous prime is 1981883677. The next prime is 1981883699. The reversal of 1981883692 is 2963881891.

It is not an unprimeable number, because it can be changed into a prime (1981883699) 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 7 ways as a sum of consecutive naturals, for example, 418248 + ... + 422959.

Almost surely, 2^1981883692 is an apocalyptic number.

It is an amenable number.

1981883692 is a deficient number, since it is larger than the sum of its proper divisors (1786728148).

1981883692 is a wasteful number, since it uses less digits than its factorization.

1981883692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841261 (or 841259 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 55.

The square root of 1981883692 is about 44518.3523055380. The cubic root of 1981883692 is about 1256.1053191398.

The spelling of 1981883692 in words is "one billion, nine hundred eighty-one million, eight hundred eighty-three thousand, six hundred ninety-two".