89809980 has 144 divisors (see below), whose sum is σ = 288870624. Its totient is φ = 20766720.

The previous prime is 89809969. The next prime is 89809987. The reversal of 89809980 is 8990898.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89809987) 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 47 ways as a sum of consecutive naturals, for example, 172120 + ... + 172640.

It is an arithmetic number, because the mean of its divisors is an integer number (2006046).

Almost surely, 2^89809980 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 89809980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144435312).

89809980 is an abundant number, since it is smaller than the sum of its proper divisors (199060644).

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

89809980 is a wasteful number, since it uses less digits than its factorization.

89809980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576 (or 561 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 51.

The square root of 89809980 is about 9476.8127553519. The cubic root of 89809980 is about 447.8248611222.

The spelling of 89809980 in words is "eighty-nine million, eight hundred nine thousand, nine hundred eighty".