9889565400 has 576 divisors, whose sum is σ = 40492408320. Its totient is φ = 2211494400.

The previous prime is 9889565393. The next prime is 9889565401. The reversal of 9889565400 is 45659889.

It is a happy number.

9889565400 is a `hidden beast` number, since 9 + 8 + 8 + 95 + 6 + 540 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9889565401) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 6949089 + ... + 6950511.

It is an arithmetic number, because the mean of its divisors is an integer number (70299320).

Almost surely, 2^9889565400 is an apocalyptic number.

9889565400 is a gapful number since it is divisible by the number (90) 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 9889565400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20246204160).

9889565400 is an abundant number, since it is smaller than the sum of its proper divisors (30602842920).

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

9889565400 is a wasteful number, since it uses less digits than its factorization.

9889565400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478 (or 1457 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 54.

The square root of 9889565400 is about 99446.2940485969. The cubic root of 9889565400 is about 2146.4745106388.

The spelling of 9889565400 in words is "nine billion, eight hundred eighty-nine million, five hundred sixty-five thousand, four hundred".