404042404240 has 40 divisors (see below), whose sum is σ = 940277552760. Its totient is φ = 161465742336.

The previous prime is 404042404211. The next prime is 404042404247. The reversal of 404042404240 is 42404240404.

It can be written as a sum of positive squares in 4 ways, for example, as 1213546896 + 402828857344 = 34836^2 + 634688^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 404042404199 and 404042404208.

It is not an unprimeable number, because it can be changed into a prime (404042404247) 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, 2276749 + ... + 2447788.

It is an arithmetic number, because the mean of its divisors is an integer number (23506938819).

Almost surely, 2^404042404240 is an apocalyptic number.

404042404240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404042404240 is an abundant number, since it is smaller than the sum of its proper divisors (536235148520).

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

404042404240 is a wasteful number, since it uses less digits than its factorization.

404042404240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4725619 (or 4725613 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 404042404240 its reverse (42404240404), we get a palindrome (446446644644).

The spelling of 404042404240 in words is "four hundred four billion, forty-two million, four hundred four thousand, two hundred forty".