1440221300 has 144 divisors (see below), whose sum is σ = 3885251328. Its totient is φ = 452044800.

The previous prime is 1440221267. The next prime is 1440221339. The reversal of 1440221300 is 31220441.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 438665 + ... + 441935.

It is an arithmetic number, because the mean of its divisors is an integer number (26980912).

Almost surely, 2^1440221300 is an apocalyptic number.

1440221300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1440221300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1942625664).

1440221300 is an abundant number, since it is smaller than the sum of its proper divisors (2445030028).

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

1440221300 is a wasteful number, since it uses less digits than its factorization.

1440221300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3346 (or 3339 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1440221300 is about 37950.2476935263. The cubic root of 1440221300 is about 1129.3010792700.

Adding to 1440221300 its reverse (31220441), we get a palindrome (1471441741).

The spelling of 1440221300 in words is "one billion, four hundred forty million, two hundred twenty-one thousand, three hundred".