404240344040 has 64 divisors (see below), whose sum is σ = 979591536000. Its totient is φ = 149244855552.

The previous prime is 404240344037. The next prime is 404240344091. The reversal of 404240344040 is 40443042404.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 404240343994 and 404240344012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7473011 + ... + 7526909.

It is an arithmetic number, because the mean of its divisors is an integer number (15306117750).

Almost surely, 2^404240344040 is an apocalyptic number.

404240344040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404240344040 is an abundant number, since it is smaller than the sum of its proper divisors (575351191960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404240344040 is a wasteful number, since it uses less digits than its factorization.

404240344040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68346 (or 68342 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 29.

Adding to 404240344040 its reverse (40443042404), we get a palindrome (444683386444).

The spelling of 404240344040 in words is "four hundred four billion, two hundred forty million, three hundred forty-four thousand, forty".