1440004431 has 8 divisors (see below), whose sum is σ = 2032947504. Its totient is φ = 903532160.

The previous prime is 1440004421. The next prime is 1440004481. The reversal of 1440004431 is 1344000441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1440004431 - 2¹¹ = 1440002383 is a prime.

It is a super-2 number, since 2×1440004431² = 4147225522599267522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1440004398 and 1440004407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440004421) 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, 14117640 + ... + 14117741.

It is an arithmetic number, because the mean of its divisors is an integer number (254118438).

Almost surely, 2^1440004431 is an apocalyptic number.

1440004431 is a deficient number, since it is larger than the sum of its proper divisors (592943073).

1440004431 is a wasteful number, since it uses less digits than its factorization.

1440004431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28235401.

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

The square root of 1440004431 is about 37947.3903055269. The cubic root of 1440004431 is about 1129.2443929146.

Adding to 1440004431 its reverse (1344000441), we get a palindrome (2784004872).

The spelling of 1440004431 in words is "one billion, four hundred forty million, four thousand, four hundred thirty-one".