1021444444 has 24 divisors (see below), whose sum is σ = 1872547488. Its totient is φ = 486604800.

The previous prime is 1021444433. The next prime is 1021444447. The reversal of 1021444444 is 4444441201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021444447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2044 + ... + 45244.

It is an arithmetic number, because the mean of its divisors is an integer number (78022812).

Almost surely, 2^1021444444 is an apocalyptic number.

It is an amenable number.

1021444444 is a deficient number, since it is larger than the sum of its proper divisors (851103044).

1021444444 is a wasteful number, since it uses less digits than its factorization.

1021444444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43485 (or 43483 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

The square root of 1021444444 is about 31960.0444930854. The cubic root of 1021444444 is about 1007.0976521486.

Adding to 1021444444 its reverse (4444441201), we get a palindrome (5465885645).

The spelling of 1021444444 in words is "one billion, twenty-one million, four hundred forty-four thousand, four hundred forty-four".