89490 has 32 divisors (see below), whose sum is σ = 227520. Its totient is φ = 22464.

The previous prime is 89477. The next prime is 89491. The reversal of 89490 is 9498.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89491) 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, 492 + ... + 648.

It is an arithmetic number, because the mean of its divisors is an integer number (7110).

2⁸⁹⁴⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 89490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113760).

89490 is an abundant number, since it is smaller than the sum of its proper divisors (138030).

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

89490 is a wasteful number, since it uses less digits than its factorization.

89490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 89490 is about 299.1487924094. The cubic root of 89490 is about 44.7292383119.

The spelling of 89490 in words is "eighty-nine thousand, four hundred ninety".