622240 has 24 divisors (see below), whose sum is σ = 1470420. Its totient is φ = 248832.

The previous prime is 622189. The next prime is 622241. The reversal of 622240 is 42226.

622240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 620944 + 1296 = 788^2 + 36^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622241) by changing a digit.

622240 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1785 + ... + 2104.

2⁶²²²⁴⁰ is an apocalyptic number.

It is an amenable number.

622240 is an abundant number, since it is smaller than the sum of its proper divisors (848180).

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

622240 is a wasteful number, since it uses less digits than its factorization.

622240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3904 (or 3896 counting only the distinct ones).

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

The square root of 622240 is about 788.8219063895. The cubic root of 622240 is about 85.3727573909.

Adding to 622240 its reverse (42226), we get a palindrome (664466).

The spelling of 622240 in words is "six hundred twenty-two thousand, two hundred forty".