404026688 has 28 divisors (see below), whose sum is σ = 863414580. Its totient is φ = 186473472.

The previous prime is 404026673. The next prime is 404026691. The reversal of 404026688 is 886620404.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 207129664 + 196897024 = 14392^2 + 14032^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241973 + ... + 243636.

It is an arithmetic number, because the mean of its divisors is an integer number (30836235).

Almost surely, 2^404026688 is an apocalyptic number.

It is an amenable number.

404026688 is an abundant number, since it is smaller than the sum of its proper divisors (459387892).

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

404026688 is a wasteful number, since it uses less digits than its factorization.

404026688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485634 (or 485624 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 404026688 is about 20100.4151200914. The cubic root of 404026688 is about 739.2704570436.

The spelling of 404026688 in words is "four hundred four million, twenty-six thousand, six hundred eighty-eight".