1440220111 has 16 divisors (see below), whose sum is σ = 1583084160. Its totient is φ = 1299388320.

The previous prime is 1440220109. The next prime is 1440220123. The reversal of 1440220111 is 1110220441.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1440220111 - 2¹ = 1440220109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440220181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 911320 + ... + 912898.

It is an arithmetic number, because the mean of its divisors is an integer number (98942760).

Almost surely, 2^1440220111 is an apocalyptic number.

1440220111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1440220111 is a deficient number, since it is larger than the sum of its proper divisors (142864049).

1440220111 is a wasteful number, since it uses less digits than its factorization.

1440220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2166.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1440220111 is about 37950.2320282762. The cubic root of 1440220111 is about 1129.3007684985.

Adding to 1440220111 its reverse (1110220441), we get a palindrome (2550440552).

The spelling of 1440220111 in words is "one billion, four hundred forty million, two hundred twenty thousand, one hundred eleven".