9994409880 has 384 divisors, whose sum is σ = 38731115520. Its totient is φ = 2016368640.

The previous prime is 9994409801. The next prime is 9994409921. The reversal of 9994409880 is 889044999.

It is a super-2 number, since 2×9994409880² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3263550 + ... + 3266610.

It is an arithmetic number, because the mean of its divisors is an integer number (100862280).

Almost surely, 2^9994409880 is an apocalyptic number.

9994409880 is the 81627-th pentagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9994409880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19365557760).

9994409880 is an abundant number, since it is smaller than the sum of its proper divisors (28736705640).

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

9994409880 is a wasteful number, since it uses less digits than its factorization.

9994409880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131 (or 3114 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 60.

The square root of 9994409880 is about 99972.0454927276. The cubic root of 9994409880 is about 2154.0331635882.

The spelling of 9994409880 in words is "nine billion, nine hundred ninety-four million, four hundred nine thousand, eight hundred eighty".