1440123140 has 12 divisors (see below), whose sum is σ = 3024258636. Its totient is φ = 576049248.

The previous prime is 1440123137. The next prime is 1440123161. The reversal of 1440123140 is 413210441.

It can be written as a sum of positive squares in 2 ways, for example, as 1041481984 + 398641156 = 32272^2 + 19966^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 72006157 = 1440123140 / (1 + 4 + 4 + 0 + 1 + 2 + 3 + 1 + 4 + 0).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36003059 + ... + 36003098.

It is an arithmetic number, because the mean of its divisors is an integer number (252021553).

Almost surely, 2^1440123140 is an apocalyptic number.

1440123140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1440123140 is an abundant number, since it is smaller than the sum of its proper divisors (1584135496).

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

1440123140 is a wasteful number, since it uses less digits than its factorization.

1440123140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72006166 (or 72006164 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1440123140 is about 37948.9543992980. The cubic root of 1440123140 is about 1129.2754223999.

Adding to 1440123140 its reverse (413210441), we get a palindrome (1853333581).

The spelling of 1440123140 in words is "one billion, four hundred forty million, one hundred twenty-three thousand, one hundred forty".