1440312012 has 144 divisors (see below), whose sum is σ = 3966187680. Its totient is φ = 439025664.

The previous prime is 1440312011. The next prime is 1440312017. The reversal of 1440312012 is 2102130441.

It is a super-2 number, since 2×1440312012² = 4148997383822976288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1440312011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4080028 + ... + 4080380.

It is an arithmetic number, because the mean of its divisors is an integer number (27542970).

Almost surely, 2^1440312012 is an apocalyptic number.

1440312012 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 1440312012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1983093840).

1440312012 is an abundant number, since it is smaller than the sum of its proper divisors (2525875668).

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

1440312012 is a wasteful number, since it uses less digits than its factorization.

1440312012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1440312012 is about 37951.4428184226. The cubic root of 1440312012 is about 1129.3247883599.

Adding to 1440312012 its reverse (2102130441), we get a palindrome (3542442453).

The spelling of 1440312012 in words is "one billion, four hundred forty million, three hundred twelve thousand, twelve".