404444420 has 24 divisors (see below), whose sum is σ = 886261824. Its totient is φ = 154743776.

The previous prime is 404444407. The next prime is 404444437. The reversal of 404444420 is 24444404.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 404444420.

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 7 ways as a sum of consecutive naturals, for example, 439154 + ... + 440073.

It is an arithmetic number, because the mean of its divisors is an integer number (36927576).

Almost surely, 2^404444420 is an apocalyptic number.

It is an amenable number.

404444420 is an abundant number, since it is smaller than the sum of its proper divisors (481817404).

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

404444420 is a wasteful number, since it uses less digits than its factorization.

404444420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879259 (or 879257 counting only the distinct ones).

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

The square root of 404444420 is about 20110.8035642537. The cubic root of 404444420 is about 739.5251518991.

Adding to 404444420 its reverse (24444404), we get a palindrome (428888824).

The spelling of 404444420 in words is "four hundred four million, four hundred forty-four thousand, four hundred twenty".