1981070588 has 96 divisors (see below), whose sum is σ = 4316054400. Its totient is φ = 792529920.

The previous prime is 1981070519. The next prime is 1981070603. The reversal of 1981070588 is 8850701891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3661598 + ... + 3662138.

It is an arithmetic number, because the mean of its divisors is an integer number (44958900).

Almost surely, 2^1981070588 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 1981070588, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2158027200).

1981070588 is an abundant number, since it is smaller than the sum of its proper divisors (2334983812).

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

1981070588 is a wasteful number, since it uses less digits than its factorization.

1981070588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 47.

The square root of 1981070588 is about 44509.2191349163. The cubic root of 1981070588 is about 1255.9335155891.

The spelling of 1981070588 in words is "one billion, nine hundred eighty-one million, seventy thousand, five hundred eighty-eight".