1440542220 has 48 divisors (see below), whose sum is σ = 4343791200. Its totient is φ = 354594816.

The previous prime is 1440542189. The next prime is 1440542221. The reversal of 1440542220 is 222450441.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1440542221) 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 15 ways as a sum of consecutive naturals, for example, 922645 + ... + 924204.

It is an arithmetic number, because the mean of its divisors is an integer number (90495650).

Almost surely, 2^1440542220 is an apocalyptic number.

1440542220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1440542220 is an abundant number, since it is smaller than the sum of its proper divisors (2903248980).

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

1440542220 is a wasteful number, since it uses less digits than its factorization.

1440542220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846874 (or 1846872 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 1440542220 is about 37954.4756254121. The cubic root of 1440542220 is about 1129.3849525810.

Adding to 1440542220 its reverse (222450441), we get a palindrome (1662992661).

The spelling of 1440542220 in words is "one billion, four hundred forty million, five hundred forty-two thousand, two hundred twenty".