1440212440 has 32 divisors (see below), whose sum is σ = 3293606160. Its totient is φ = 566640000.

The previous prime is 1440212437. The next prime is 1440212441. The reversal of 1440212440 is 442120441.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440212441) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 292686 + ... + 297565.

Almost surely, 2^1440212440 is an apocalyptic number.

1440212440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1440212440 is an abundant number, since it is smaller than the sum of its proper divisors (1853393720).

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

1440212440 is a wasteful number, since it uses less digits than its factorization.

1440212440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590323 (or 590319 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 1440212440 is about 37950.1309615659. The cubic root of 1440212440 is about 1129.2987635083.

Adding to 1440212440 its reverse (442120441), we get a palindrome (1882332881).

The spelling of 1440212440 in words is "one billion, four hundred forty million, two hundred twelve thousand, four hundred forty".