1444404140 has 48 divisors (see below), whose sum is σ = 3200783040. Its totient is φ = 546416640.

The previous prime is 1444404121. The next prime is 1444404217. The reversal of 1444404140 is 414044441.

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, 23300 + ... + 58580.

It is an arithmetic number, because the mean of its divisors is an integer number (66682980).

Almost surely, 2^1444404140 is an apocalyptic number.

1444404140 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 1444404140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1600391520).

1444404140 is an abundant number, since it is smaller than the sum of its proper divisors (1756378900).

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

1444404140 is a wasteful number, since it uses less digits than its factorization.

1444404140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35402 (or 35400 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

The square root of 1444404140 is about 38005.3172595625. The cubic root of 1444404140 is about 1130.3933003254.

Adding to 1444404140 its reverse (414044441), we get a palindrome (1858448581).

The spelling of 1444404140 in words is "one billion, four hundred forty-four million, four hundred four thousand, one hundred forty".