989380581 has 32 divisors (see below), whose sum is σ = 1575383040. Its totient is φ = 540021504.

The previous prime is 989380549. The next prime is 989380583. The reversal of 989380581 is 185083989.

It is not a de Polignac number, because 989380581 - 2⁵ = 989380549 is a prime.

It is a super-2 number, since 2×989380581² = 1957747868119795122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989380583) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 636301 + ... + 637853.

It is an arithmetic number, because the mean of its divisors is an integer number (49230720).

Almost surely, 2^989380581 is an apocalyptic number.

It is an amenable number.

989380581 is a deficient number, since it is larger than the sum of its proper divisors (586002459).

989380581 is a wasteful number, since it uses less digits than its factorization.

989380581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2905.

The product of its (nonzero) digits is 622080, while the sum is 51.

The square root of 989380581 is about 31454.4206908981. The cubic root of 989380581 is about 996.4475889860.

The spelling of 989380581 in words is "nine hundred eighty-nine million, three hundred eighty thousand, five hundred eighty-one".