1440012404 has 24 divisors (see below), whose sum is σ = 2670764040. Its totient is φ = 677016576.

The previous prime is 1440012349. The next prime is 1440012419. The reversal of 1440012404 is 4042100441.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 165379600 + 1274632804 = 12860^2 + 35702^2 .

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, 67394 + ... + 86150.

It is an arithmetic number, because the mean of its divisors is an integer number (111281835).

Almost surely, 2^1440012404 is an apocalyptic number.

It is an amenable number.

1440012404 is a deficient number, since it is larger than the sum of its proper divisors (1230751636).

1440012404 is a wasteful number, since it uses less digits than its factorization.

1440012404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19907 (or 19905 counting only the distinct ones).

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

The square root of 1440012404 is about 37947.4953587190. The cubic root of 1440012404 is about 1129.2464770398.

Adding to 1440012404 its reverse (4042100441), we get a palindrome (5482112845).

The spelling of 1440012404 in words is "one billion, four hundred forty million, twelve thousand, four hundred four".