89131428 has 72 divisors (see below), whose sum is σ = 236107872. Its totient is φ = 29398464.

The previous prime is 89131423. The next prime is 89131429. The reversal of 89131428 is 82413198.

It is a super-2 number, since 2×89131428² = 15888822914638368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 89131392 and 89131401.

It is not an unprimeable number, because it can be changed into a prime (89131421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103576 + ... + 104432.

It is an arithmetic number, because the mean of its divisors is an integer number (3279276).

Almost surely, 2^89131428 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 89131428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118053936).

89131428 is an abundant number, since it is smaller than the sum of its proper divisors (146976444).

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

89131428 is a wasteful number, since it uses less digits than its factorization.

89131428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983 (or 969 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 89131428 is about 9440.9442324378. The cubic root of 89131428 is about 446.6941739452.

The spelling of 89131428 in words is "eighty-nine million, one hundred thirty-one thousand, four hundred twenty-eight".