1440402105 has 16 divisors (see below), whose sum is σ = 2343706560. Its totient is φ = 755193408.

The previous prime is 1440402097. The next prime is 1440402109. The reversal of 1440402105 is 5012040441.

It is a happy number.

It is not a de Polignac number, because 1440402105 - 2³ = 1440402097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1440402109) 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, 812902 + ... + 814671.

It is an arithmetic number, because the mean of its divisors is an integer number (146481660).

Almost surely, 2^1440402105 is an apocalyptic number.

1440402105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1440402105 is a deficient number, since it is larger than the sum of its proper divisors (903304455).

1440402105 is a wasteful number, since it uses less digits than its factorization.

1440402105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627640.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1440402105 is about 37952.6297507828. The cubic root of 1440402105 is about 1129.3483346786.

Adding to 1440402105 its reverse (5012040441), we get a palindrome (6452442546).

The spelling of 1440402105 in words is "one billion, four hundred forty million, four hundred two thousand, one hundred five".