89217540 has 108 divisors (see below), whose sum is σ = 285827724. Its totient is φ = 22522752.

The previous prime is 89217533. The next prime is 89217553. The reversal of 89217540 is 4571298.

It can be written as a sum of positive squares in 2 ways, for example, as 67371264 + 21846276 = 8208^2 + 4674^2 .

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 = 89217495 and 89217504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 64294 + ... + 65666.

It is an arithmetic number, because the mean of its divisors is an integer number (2646553).

Almost surely, 2^89217540 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 89217540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142913862).

89217540 is an abundant number, since it is smaller than the sum of its proper divisors (196610184).

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

89217540 is a wasteful number, since it uses less digits than its factorization.

89217540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426 (or 1402 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 89217540 is about 9445.5036922337. The cubic root of 89217540 is about 446.8379816109.

It can be divided in two parts, 8921 and 7540, that added together give a palindrome (16461).

The spelling of 89217540 in words is "eighty-nine million, two hundred seventeen thousand, five hundred forty".