404840680144 has 20 divisors (see below), whose sum is σ = 784394928324. Its totient is φ = 202416182528.

The previous prime is 404840680043. The next prime is 404840680219. The reversal of 404840680144 is 441086048404.

It can be written as a sum of positive squares in 2 ways, for example, as 276381518400 + 128459161744 = 525720^2 + 358412^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 404840680144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637374 + ... + 1102690.

Almost surely, 2^404840680144 is an apocalyptic number.

It is an amenable number.

404840680144 is a deficient number, since it is larger than the sum of its proper divisors (379554248180).

404840680144 is a wasteful number, since it uses less digits than its factorization.

404840680144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519702 (or 519696 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 43.

The spelling of 404840680144 in words is "four hundred four billion, eight hundred forty million, six hundred eighty thousand, one hundred forty-four".