622440020 has 24 divisors (see below), whose sum is σ = 1310644104. Its totient is φ = 248305536.

The previous prime is 622440001. The next prime is 622440037. The reversal of 622440020 is 20044226.

It can be written as a sum of positive squares in 4 ways, for example, as 835396 + 621604624 = 914^2 + 24932^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 622439974 and 622440001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34259 + ... + 49178.

It is an arithmetic number, because the mean of its divisors is an integer number (54610171).

Almost surely, 2^622440020 is an apocalyptic number.

It is an amenable number.

622440020 is an abundant number, since it is smaller than the sum of its proper divisors (688204084).

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

622440020 is a wasteful number, since it uses less digits than its factorization.

622440020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83819 (or 83817 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 622440020 is about 24948.7478643719. The cubic root of 622440020 is about 853.8190414538.

Adding to 622440020 its reverse (20044226), we get a palindrome (642484246).

The spelling of 622440020 in words is "six hundred twenty-two million, four hundred forty thousand, twenty".