89997881472 has 192 divisors, whose sum is σ = 263502720000. Its totient is φ = 29479790592.

The previous prime is 89997881471. The next prime is 89997881503. The reversal of 89997881472 is 27418879998.

89997881472 is a `hidden beast` number, since 8 + 9 + 9 + 9 + 78 + 81 + 472 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 89997881472.

It is not an unprimeable number, because it can be changed into a prime (89997881471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15651654 + ... + 15657402.

It is an arithmetic number, because the mean of its divisors is an integer number (1372410000).

Almost surely, 2^89997881472 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 89997881472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131751360000).

89997881472 is an abundant number, since it is smaller than the sum of its proper divisors (173504838528).

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

89997881472 is a wasteful number, since it uses less digits than its factorization.

89997881472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6003 (or 5988 counting only the distinct ones).

The product of its digits is 146313216, while the sum is 72.

The spelling of 89997881472 in words is "eighty-nine billion, nine hundred ninety-seven million, eight hundred eighty-one thousand, four hundred seventy-two".