1440400142 has 16 divisors (see below), whose sum is σ = 2194359552. Its totient is φ = 709025280.

The previous prime is 1440400097. The next prime is 1440400163. The reversal of 1440400142 is 2410040441.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17618 + ... + 56490.

It is an arithmetic number, because the mean of its divisors is an integer number (137147472).

Almost surely, 2^1440400142 is an apocalyptic number.

1440400142 is a deficient number, since it is larger than the sum of its proper divisors (753959410).

1440400142 is a wasteful number, since it uses less digits than its factorization.

1440400142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39163.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1440400142 is about 37952.6038895884. The cubic root of 1440400142 is about 1129.3478216478.

Adding to 1440400142 its reverse (2410040441), we get a palindrome (3850440583).

The spelling of 1440400142 in words is "one billion, four hundred forty million, four hundred thousand, one hundred forty-two".