404240424020 has 24 divisors (see below), whose sum is σ = 854602245000. Its totient is φ = 160610959232.

The previous prime is 404240423969. The next prime is 404240424037. The reversal of 404240424020 is 20424042404.

It can be written as a sum of positive squares in 4 ways, for example, as 37387316164 + 366853107856 = 193358^2 + 605684^2 .

It is a super-3 number, since 3×404240424020³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67822595 + ... + 67828554.

It is an arithmetic number, because the mean of its divisors is an integer number (35608426875).

Almost surely, 2^404240424020 is an apocalyptic number.

It is an amenable number.

404240424020 is an abundant number, since it is smaller than the sum of its proper divisors (450361820980).

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

404240424020 is a wasteful number, since it uses less digits than its factorization.

404240424020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135651307 (or 135651305 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 404240424020 its reverse (20424042404), we get a palindrome (424664466424).

The spelling of 404240424020 in words is "four hundred four billion, two hundred forty million, four hundred twenty-four thousand, twenty".