3440402120431 has 16 divisors (see below), whose sum is σ = 3517917607008. Its totient is φ = 3363775792000.

The previous prime is 3440402120429. The next prime is 3440402120437. The reversal of 3440402120431 is 1340212040443.

It is a cyclic number.

It is not a de Polignac number, because 3440402120431 - 2¹ = 3440402120429 is a prime.

It is a super-2 number, since 2×3440402120431² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3440402120431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3440402120437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18661041 + ... + 18844501.

It is an arithmetic number, because the mean of its divisors is an integer number (219869850438).

Almost surely, 2^{3440402120431} is an apocalyptic number.

3440402120431 is a deficient number, since it is larger than the sum of its proper divisors (77515486577).

3440402120431 is a wasteful number, since it uses less digits than its factorization.

3440402120431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185882.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 3440402120431 its reverse (1340212040443), we get a palindrome (4780614160874).

The spelling of 3440402120431 in words is "three trillion, four hundred forty billion, four hundred two million, one hundred twenty thousand, four hundred thirty-one".