1444435440 has 80 divisors (see below), whose sum is σ = 5117434368. Its totient is φ = 330156288.

The previous prime is 1444435429. The next prime is 1444435459. The reversal of 1444435440 is 445344441.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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, 428212 + ... + 431571.

Almost surely, 2^1444435440 is an apocalyptic number.

1444435440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1444435440 is an abundant number, since it is smaller than the sum of its proper divisors (3672998928).

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

1444435440 is a wasteful number, since it uses less digits than its factorization.

1444435440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859806 (or 859800 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 33.

The square root of 1444435440 is about 38005.7290418168. The cubic root of 1444435440 is about 1130.4014654120.

Adding to 1444435440 its reverse (445344441), we get a palindrome (1889779881).

Subtracting from 1444435440 its reverse (445344441), we obtain a palindrome (999090999).

The spelling of 1444435440 in words is "one billion, four hundred forty-four million, four hundred thirty-five thousand, four hundred forty".