622404 has 60 divisors (see below), whose sum is σ = 1738044. Its totient is φ = 193536.

The previous prime is 622399. The next prime is 622423. The reversal of 622404 is 404226.

622404 is a `hidden beast` number, since 622 + 40 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 202500 + 419904 = 450^2 + 648^2 .

It is a super-3 number, since 3×622404³ = 723333168104985792, which contains 333 as substring.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

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

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 19 ways as a sum of consecutive naturals, for example, 5452 + ... + 5564.

2⁶²²⁴⁰⁴ 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 622404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (869022).

622404 is an abundant number, since it is smaller than the sum of its proper divisors (1115640).

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

622404 is a wasteful number, since it uses less digits than its factorization.

622404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146 (or 135 counting only the distinct ones).

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

The square root of 622404 is about 788.9258520292. The cubic root of 622404 is about 85.3802571243.

The spelling of 622404 in words is "six hundred twenty-two thousand, four hundred four".