89281 has 8 divisors (see below), whose sum is σ = 97280. Its totient is φ = 81648.

The previous prime is 89273. The next prime is 89293. The reversal of 89281 is 18298.

89281 = T₂₅ + T₂₆ + ... + T₈₁.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 89281 - 2³ = 89273 is a prime.

It is a super-2 number, since 2×89281² = 15942193922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 640 + ... + 766.

It is an arithmetic number, because the mean of its divisors is an integer number (12160).

2⁸⁹²⁸¹ is an apocalyptic number.

It is an amenable number.

89281 is a deficient number, since it is larger than the sum of its proper divisors (7999).

89281 is a wasteful number, since it uses less digits than its factorization.

89281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183.

The product of its digits is 1152, while the sum is 28.

The square root of 89281 is about 298.7992637206. The cubic root of 89281 is about 44.6943901059.

Subtracting from 89281 its sum of digits (28), we obtain a triangular number (89253 = T₄₂₂).

The spelling of 89281 in words is "eighty-nine thousand, two hundred eighty-one".