1440023142 has 16 divisors (see below), whose sum is σ = 2882804400. Its totient is φ = 479548032.

The previous prime is 1440023141. The next prime is 1440023147. The reversal of 1440023142 is 2413200441.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440023141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108103 + ... + 120690.

It is an arithmetic number, because the mean of its divisors is an integer number (180175275).

Almost surely, 2^1440023142 is an apocalyptic number.

1440023142 is an abundant number, since it is smaller than the sum of its proper divisors (1442781258).

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

1440023142 is a wasteful number, since it uses less digits than its factorization.

1440023142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229847.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1440023142 is about 37947.6368434189. The cubic root of 1440023142 is about 1129.2492839181.

Adding to 1440023142 its reverse (2413200441), we get a palindrome (3853223583).

The spelling of 1440023142 in words is "one billion, four hundred forty million, twenty-three thousand, one hundred forty-two".