9901443090 has 384 divisors, whose sum is σ = 31743000576. Its totient is φ = 1918080000.

The previous prime is 9901443049. The next prime is 9901443091. The reversal of 9901443090 is 903441099.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9901443091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 98034040 + ... + 98034140.

It is an arithmetic number, because the mean of its divisors is an integer number (82664064).

Almost surely, 2^9901443090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9901443090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15871500288).

9901443090 is an abundant number, since it is smaller than the sum of its proper divisors (21841557486).

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

9901443090 is a wasteful number, since it uses less digits than its factorization.

9901443090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 9901443090 is about 99505.9952465177. The cubic root of 9901443090 is about 2147.3334954295. Note that the first 3 decimals are identical.

The spelling of 9901443090 in words is "nine billion, nine hundred one million, four hundred forty-three thousand, ninety".