1981230592 has 80 divisors (see below), whose sum is σ = 4572711792. Its totient is φ = 847544320.

The previous prime is 1981230551. The next prime is 1981230623. The reversal of 1981230592 is 2950321891.

It is a super-3 number, since 3×1981230592³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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, 85398 + ... + 106090.

Almost surely, 2^1981230592 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1981230592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2286355896).

1981230592 is an abundant number, since it is smaller than the sum of its proper divisors (2591481200).

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

1981230592 is a wasteful number, since it uses less digits than its factorization.

1981230592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20739 (or 20723 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 1981230592 is about 44511.0165240022. The cubic root of 1981230592 is about 1255.9673271012.

The spelling of 1981230592 in words is "one billion, nine hundred eighty-one million, two hundred thirty thousand, five hundred ninety-two".