404021322 has 48 divisors (see below), whose sum is σ = 885404520. Its totient is φ = 133142400.

The previous prime is 404021273. The next prime is 404021329. The reversal of 404021322 is 223120404.

It can be written as a sum of positive squares in 4 ways, for example, as 87216921 + 316804401 = 9339^2 + 17799^2 .

It is a super-3 number, since 3×404021322³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 404021295 and 404021304.

It is not an unprimeable number, because it can be changed into a prime (404021329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 876172 + ... + 876632.

Almost surely, 2^404021322 is an apocalyptic number.

404021322 is an abundant number, since it is smaller than the sum of its proper divisors (481383198).

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

404021322 is a wasteful number, since it uses less digits than its factorization.

404021322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919 (or 916 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 404021322 is about 20100.2816398179. The cubic root of 404021322 is about 739.2671842046.

Adding to 404021322 its reverse (223120404), we get a palindrome (627141726).

The spelling of 404021322 in words is "four hundred four million, twenty-one thousand, three hundred twenty-two".