1440332412 has 96 divisors (see below), whose sum is σ = 3631703040. Its totient is φ = 442659840.

The previous prime is 1440332393. The next prime is 1440332459. The reversal of 1440332412 is 2142330441.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4011889 + ... + 4012247.

It is an arithmetic number, because the mean of its divisors is an integer number (37830240).

Almost surely, 2^1440332412 is an apocalyptic number.

1440332412 is a gapful number since it is divisible by the number (12) 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 1440332412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1815851520).

1440332412 is an abundant number, since it is smaller than the sum of its proper divisors (2191370628).

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

1440332412 is a wasteful number, since it uses less digits than its factorization.

1440332412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731 (or 729 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 1440332412 is about 37951.7115819564. The cubic root of 1440332412 is about 1129.3301201021.

Adding to 1440332412 its reverse (2142330441), we get a palindrome (3582662853).

The spelling of 1440332412 in words is "one billion, four hundred forty million, three hundred thirty-two thousand, four hundred twelve".