1444421000 has 64 divisors (see below), whose sum is σ = 3687240960. Its totient is φ = 525240000.

The previous prime is 1444420993. The next prime is 1444421047. The reversal of 1444421000 is 1244441.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54656 + ... + 76655.

It is an arithmetic number, because the mean of its divisors is an integer number (57613140).

Almost surely, 2^1444421000 is an apocalyptic number.

1444421000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1444421000 is an abundant number, since it is smaller than the sum of its proper divisors (2242819960).

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

1444421000 is a wasteful number, since it uses less digits than its factorization.

1444421000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131343 (or 131329 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1444421000 is about 38005.5390699829. The cubic root of 1444421000 is about 1130.3976985305.

Adding to 1444421000 its reverse (1244441), we get a palindrome (1445665441).

The spelling of 1444421000 in words is "one billion, four hundred forty-four million, four hundred twenty-one thousand".