89837640 has 128 divisors (see below), whose sum is σ = 301708800. Its totient is φ = 23777280.

The previous prime is 89837551. The next prime is 89837647. The reversal of 89837640 is 4673898.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (89837647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 208225 + ... + 208655.

It is an arithmetic number, because the mean of its divisors is an integer number (2357100).

Almost surely, 2^89837640 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 89837640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150854400).

89837640 is an abundant number, since it is smaller than the sum of its proper divisors (211871160).

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

89837640 is a wasteful number, since it uses less digits than its factorization.

89837640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644 (or 634 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 89837640 is about 9478.2719944091. The cubic root of 89837640 is about 447.8708306393.

The spelling of 89837640 in words is "eighty-nine million, eight hundred thirty-seven thousand, six hundred forty".