1440013401 has 24 divisors (see below), whose sum is σ = 2236091520. Its totient is φ = 890126496.

The previous prime is 1440013349. The next prime is 1440013423. The reversal of 1440013401 is 1043100441.

It is not a de Polignac number, because 1440013401 - 2²⁹ = 903142489 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1440013901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81550 + ... + 97623.

It is an arithmetic number, because the mean of its divisors is an integer number (93170480).

Almost surely, 2^1440013401 is an apocalyptic number.

It is an amenable number.

1440013401 is a deficient number, since it is larger than the sum of its proper divisors (796078119).

1440013401 is a wasteful number, since it uses less digits than its factorization.

1440013401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179245 (or 179242 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1440013401 is about 37947.5084952886. The cubic root of 1440013401 is about 1129.2467376530.

Adding to 1440013401 its reverse (1043100441), we get a palindrome (2483113842).

The spelling of 1440013401 in words is "one billion, four hundred forty million, thirteen thousand, four hundred one".