89161820 has 48 divisors (see below), whose sum is σ = 208631808. Its totient is φ = 31728960.

The previous prime is 89161817. The next prime is 89161829. The reversal of 89161820 is 2816198.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89161829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6029 + ... + 14651.

It is an arithmetic number, because the mean of its divisors is an integer number (4346496).

Almost surely, 2^89161820 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 89161820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104315904).

89161820 is an abundant number, since it is smaller than the sum of its proper divisors (119469988).

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

89161820 is a wasteful number, since it uses less digits than its factorization.

89161820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8690 (or 8688 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 89161820 is about 9442.5536800169. The cubic root of 89161820 is about 446.7449393781.

The spelling of 89161820 in words is "eighty-nine million, one hundred sixty-one thousand, eight hundred twenty".