89531288 has 96 divisors (see below), whose sum is σ = 214949280. Its totient is φ = 34214400.

The previous prime is 89531251. The next prime is 89531293. The reversal of 89531288 is 88213598.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 494558 + ... + 494738.

It is an arithmetic number, because the mean of its divisors is an integer number (2239055).

Almost surely, 2^89531288 is an apocalyptic number.

89531288 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 89531288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107474640).

89531288 is an abundant number, since it is smaller than the sum of its proper divisors (125417992).

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

89531288 is a wasteful number, since it uses less digits than its factorization.

89531288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289 (or 274 counting only the distinct ones).

The product of its digits is 138240, while the sum is 44.

The square root of 89531288 is about 9462.0974418994. The cubic root of 89531288 is about 447.3611616359.

The spelling of 89531288 in words is "eighty-nine million, five hundred thirty-one thousand, two hundred eighty-eight".