1981350882 has 80 divisors (see below), whose sum is σ = 5157294912. Its totient is φ = 556800480.

The previous prime is 1981350881. The next prime is 1981350919. The reversal of 1981350882 is 2880531891.

It is a happy number.

It is a super-3 number, since 3×1981350882³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1981350881) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 54853 + ... + 83495.

Almost surely, 2^1981350882 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1981350882, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2578647456).

1981350882 is an abundant number, since it is smaller than the sum of its proper divisors (3175944030).

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

1981350882 is a wasteful number, since it uses less digits than its factorization.

1981350882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28725 (or 28716 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 1981350882 is about 44512.3677420108. The cubic root of 1981350882 is about 1255.9927451844.

The spelling of 1981350882 in words is "one billion, nine hundred eighty-one million, three hundred fifty thousand, eight hundred eighty-two".