1421444444 has 24 divisors (see below), whose sum is σ = 2844411360. Its totient is φ = 608864256.

The previous prime is 1421444419. The next prime is 1421444447. The reversal of 1421444444 is 4444441241.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1421444444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421444447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43892 + ... + 69060.

It is an arithmetic number, because the mean of its divisors is an integer number (118517140).

Almost surely, 2^1421444444 is an apocalyptic number.

1421444444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1421444444 is an abundant number, since it is smaller than the sum of its proper divisors (1422966916).

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

1421444444 is a wasteful number, since it uses less digits than its factorization.

1421444444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27197 (or 27195 counting only the distinct ones).

The product of its digits is 32768, while the sum is 32.

The square root of 1421444444 is about 37702.0482732702. The cubic root of 1421444444 is about 1124.3718485754.

Adding to 1421444444 its reverse (4444441241), we get a palindrome (5865885685).

It can be divided in two parts, 1421444 and 444, that multiplied together give a palindrome (631121136).

The spelling of 1421444444 in words is "one billion, four hundred twenty-one million, four hundred forty-four thousand, four hundred forty-four".