404221544 has 16 divisors (see below), whose sum is σ = 758681700. Its totient is φ = 201906432.

The previous prime is 404221487. The next prime is 404221547. The reversal of 404221544 is 445122404.

It can be written as a sum of positive squares in 2 ways, for example, as 401200900 + 3020644 = 20030^2 + 1738^2 .

It is not an unprimeable number, because it can be changed into a prime (404221547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16967 + ... + 33110.

Almost surely, 2^404221544 is an apocalyptic number.

It is an amenable number.

404221544 is a deficient number, since it is larger than the sum of its proper divisors (354460156).

404221544 is a wasteful number, since it uses less digits than its factorization.

404221544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51092 (or 51088 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 404221544 is about 20105.2615998897. The cubic root of 404221544 is about 739.3892842867.

Adding to 404221544 its reverse (445122404), we get a palindrome (849343948).

The spelling of 404221544 in words is "four hundred four million, two hundred twenty-one thousand, five hundred forty-four".