89100000 has 360 divisors, whose sum is σ = 357305256. Its totient is φ = 21600000.

The previous prime is 89099993. The next prime is 89100001. The reversal of 89100000 is 198.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89100001) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 8099995 + ... + 8100005.

Almost surely, 2^89100000 is an apocalyptic number.

89100000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 89100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178652628).

89100000 is an abundant number, since it is smaller than the sum of its proper divisors (268205256).

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

89100000 is an equidigital number, since it uses as much as digits as its factorization.

89100000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58 (or 21 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 89100000 is about 9439.2796335314. The cubic root of 89100000 is about 446.6416658861.

Adding to 89100000 its reverse (198), we get a palindrome (89100198).

The spelling of 89100000 in words is "eighty-nine million, one hundred thousand".