1444002420 has 96 divisors (see below), whose sum is σ = 4625913600. Its totient is φ = 329693184.

The previous prime is 1444002419. The next prime is 1444002463. The reversal of 1444002420 is 242004441.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 624226 + ... + 626534.

It is an arithmetic number, because the mean of its divisors is an integer number (48186600).

Almost surely, 2^1444002420 is an apocalyptic number.

1444002420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1444002420 is an abundant number, since it is smaller than the sum of its proper divisors (3181911180).

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

1444002420 is a wasteful number, since it uses less digits than its factorization.

1444002420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3817 (or 3815 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 1444002420 is about 38000.0318420919. The cubic root of 1444002420 is about 1130.2884950083.

Adding to 1444002420 its reverse (242004441), we get a palindrome (1686006861).

The spelling of 1444002420 in words is "one billion, four hundred forty-four million, two thousand, four hundred twenty".