989473655040 has 288 divisors, whose sum is σ = 3405645102720. Its totient is φ = 243389104128.

The previous prime is 989473655039. The next prime is 989473655047. The reversal of 989473655040 is 40556374989.

It is a super-2 number, since 2×989473655040² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (989473655047) 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, 78817404 + ... + 78829956.

Almost surely, 2^989473655040 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 989473655040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1702822551360).

989473655040 is an abundant number, since it is smaller than the sum of its proper divisors (2416171447680).

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

989473655040 is a wasteful number, since it uses less digits than its factorization.

989473655040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14169 (or 14155 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 60.

The spelling of 989473655040 in words is "nine hundred eighty-nine billion, four hundred seventy-three million, six hundred fifty-five thousand, forty".