622642420 has 24 divisors (see below), whose sum is σ = 1311206400. Its totient is φ = 248360352.

The previous prime is 622642393. The next prime is 622642421. The reversal of 622642420 is 24246226.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622642421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36180 + ... + 50539.

It is an arithmetic number, because the mean of its divisors is an integer number (54633600).

Almost surely, 2^622642420 is an apocalyptic number.

It is an amenable number.

622642420 is an abundant number, since it is smaller than the sum of its proper divisors (688563980).

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

622642420 is a wasteful number, since it uses less digits than its factorization.

622642420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87087 (or 87085 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 622642420 is about 24952.8038504694. The cubic root of 622642420 is about 853.9115774093.

Adding to 622642420 its reverse (24246226), we get a palindrome (646888646).

The spelling of 622642420 in words is "six hundred twenty-two million, six hundred forty-two thousand, four hundred twenty".