89987328 has 144 divisors (see below), whose sum is σ = 272751360. Its totient is φ = 29251584.

The previous prime is 89987323. The next prime is 89987329. The reversal of 89987328 is 82378998.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (89987323) 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, 324726 + ... + 325002.

Almost surely, 2^89987328 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 89987328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136375680).

89987328 is an abundant number, since it is smaller than the sum of its proper divisors (182764032).

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

89987328 is a wasteful number, since it uses less digits than its factorization.

89987328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 329 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 89987328 is about 9486.1650839525. The cubic root of 89987328 is about 448.1194409422.

The spelling of 89987328 in words is "eighty-nine million, nine hundred eighty-seven thousand, three hundred twenty-eight".