89987040 has 576 divisors, whose sum is σ = 396264960. Its totient is φ = 18247680.

The previous prime is 89987011. The next prime is 89987047. The reversal of 89987040 is 4078998.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89987047) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3912469 + ... + 3912491.

It is an arithmetic number, because the mean of its divisors is an integer number (687960).

Almost surely, 2^89987040 is an apocalyptic number.

89987040 is a gapful number since it is divisible by the number (80) 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 89987040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198132480).

89987040 is an abundant number, since it is smaller than the sum of its proper divisors (306277920).

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

89987040 is a wasteful number, since it uses less digits than its factorization.

89987040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 89987040 is about 9486.1499039389. The cubic root of 89987040 is about 448.1189628803.

The spelling of 89987040 in words is "eighty-nine million, nine hundred eighty-seven thousand, forty".