89281836 has 144 divisors (see below), whose sum is σ = 281299200. Its totient is φ = 23296896.

The previous prime is 89281831. The next prime is 89281859. The reversal of 89281836 is 63818298.

It is a junction number, because it is equal to n+sod(n) for n = 89281791 and 89281800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89281831) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 138531 + ... + 139173.

Almost surely, 2^89281836 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 89281836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140649600).

89281836 is an abundant number, since it is smaller than the sum of its proper divisors (192017364).

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

89281836 is a wasteful number, since it uses less digits than its factorization.

89281836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708 (or 703 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 89281836 is about 9448.9066034118. The cubic root of 89281836 is about 446.9452960697.

It can be divided in two parts, 892 and 81836, that added together give a palindrome (82728).

The spelling of 89281836 in words is "eighty-nine million, two hundred eighty-one thousand, eight hundred thirty-six".