404229812 has 36 divisors (see below), whose sum is σ = 832178340. Its totient is φ = 171287424.

The previous prime is 404229809. The next prime is 404229817. The reversal of 404229812 is 218922404.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30426256 + 373803556 = 5516^2 + 19334^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404229817) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 5858 + ... + 29030.

It is an arithmetic number, because the mean of its divisors is an integer number (23116065).

Almost surely, 2^404229812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404229812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (416089170).

404229812 is an abundant number, since it is smaller than the sum of its proper divisors (427948528).

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

404229812 is a wasteful number, since it uses less digits than its factorization.

404229812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23280 (or 23271 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 404229812 is about 20105.4672166553. The cubic root of 404229812 is about 739.3943254405.

The spelling of 404229812 in words is "four hundred four million, two hundred twenty-nine thousand, eight hundred twelve".