1001444886 has 192 divisors, whose sum is σ = 2581383168. Its totient is φ = 278049024.

The previous prime is 1001444881. The next prime is 1001444903. The reversal of 1001444886 is 6884441001.

It is a self number, because there is not a number n which added to its sum of digits gives 1001444886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001444881) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9359245 + ... + 9359351.

It is an arithmetic number, because the mean of its divisors is an integer number (13444704).

Almost surely, 2^1001444886 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1001444886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1290691584).

1001444886 is an abundant number, since it is smaller than the sum of its proper divisors (1579938282).

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

1001444886 is a wasteful number, since it uses less digits than its factorization.

1001444886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 1001444886 is about 31645.6140088955. The cubic root of 1001444886 is about 1000.4813968865.

Adding to 1001444886 its reverse (6884441001), we get a palindrome (7885885887).

The spelling of 1001444886 in words is "one billion, one million, four hundred forty-four thousand, eight hundred eighty-six".