1440156522 has 64 divisors (see below), whose sum is σ = 3404464128. Its totient is φ = 397854000.

The previous prime is 1440156511. The next prime is 1440156539. The reversal of 1440156522 is 2256510441.

It is a self number, because there is not a number n which added to its sum of digits gives 1440156522.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1250647 + ... + 1251797.

It is an arithmetic number, because the mean of its divisors is an integer number (53194752).

Almost surely, 2^1440156522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1440156522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1702232064).

1440156522 is an abundant number, since it is smaller than the sum of its proper divisors (1964307606).

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

1440156522 is an equidigital number, since it uses as much as digits as its factorization.

1440156522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256 (or 1194 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 1440156522 is about 37949.3942244142. The cubic root of 1440156522 is about 1129.2841478530.

Adding to 1440156522 its reverse (2256510441), we get a palindrome (3696666963).

The spelling of 1440156522 in words is "one billion, four hundred forty million, one hundred fifty-six thousand, five hundred twenty-two".