89159640 has 128 divisors (see below), whose sum is σ = 281698560. Its totient is φ = 22546944.

The previous prime is 89159617. The next prime is 89159641. The reversal of 89159640 is 4695198.

It is a junction number, because it is equal to n+sod(n) for n = 89159592 and 89159601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89159641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 190687 + ... + 191153.

It is an arithmetic number, because the mean of its divisors is an integer number (2200770).

Almost surely, 2^89159640 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 89159640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140849280).

89159640 is an abundant number, since it is smaller than the sum of its proper divisors (192538920).

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

89159640 is a wasteful number, since it uses less digits than its factorization.

89159640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561 (or 557 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 89159640 is about 9442.4382444367. The cubic root of 89159640 is about 446.7412983880.

The spelling of 89159640 in words is "eighty-nine million, one hundred fifty-nine thousand, six hundred forty".