622420 has 12 divisors (see below), whose sum is σ = 1307124. Its totient is φ = 248960.

The previous prime is 622399. The next prime is 622423. The reversal of 622420 is 24226.

It can be written as a sum of positive squares in 2 ways, for example, as 276676 + 345744 = 526^2 + 588^2 .

It is a junction number, because it is equal to n+sod(n) for n = 622394 and 622403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622423) 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, 15541 + ... + 15580.

It is an arithmetic number, because the mean of its divisors is an integer number (108927).

2⁶²²⁴²⁰ is an apocalyptic number.

It is an amenable number.

622420 is an abundant number, since it is smaller than the sum of its proper divisors (684704).

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

622420 is a wasteful number, since it uses less digits than its factorization.

622420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31130 (or 31128 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 622420 is about 788.9359923340. The cubic root of 622420 is about 85.3809887351.

Adding to 622420 its reverse (24226), we get a palindrome (646646).

The spelling of 622420 in words is "six hundred twenty-two thousand, four hundred twenty".