1440421402 has 16 divisors (see below), whose sum is σ = 2477728512. Its totient is φ = 615214800.

The previous prime is 1440421399. The next prime is 1440421403. The reversal of 1440421402 is 2041240441.

It is not an unprimeable number, because it can be changed into a prime (1440421403) 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, 171474 + ... + 179677.

It is an arithmetic number, because the mean of its divisors is an integer number (154858032).

Almost surely, 2^1440421402 is an apocalyptic number.

1440421402 is a deficient number, since it is larger than the sum of its proper divisors (1037307110).

1440421402 is a wasteful number, since it uses less digits than its factorization.

1440421402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351453.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 1440421402 is about 37952.8839747390. The cubic root of 1440421402 is about 1129.3533779318.

Adding to 1440421402 its reverse (2041240441), we get a palindrome (3481661843).

The spelling of 1440421402 in words is "one billion, four hundred forty million, four hundred twenty-one thousand, four hundred two".