622465640 has 16 divisors (see below), whose sum is σ = 1400547780. Its totient is φ = 248986240.

The previous prime is 622465637. The next prime is 622465643. The reversal of 622465640 is 46564226.

It is an interprime number because it is at equal distance from previous prime (622465637) and next prime (622465643).

It can be written as a sum of positive squares in 2 ways, for example, as 621106084 + 1359556 = 24922^2 + 1166^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 622465640.

It is not an unprimeable number, because it can be changed into a prime (622465643) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 7780781 + ... + 7780860.

Almost surely, 2^622465640 is an apocalyptic number.

It is an amenable number.

622465640 is an abundant number, since it is smaller than the sum of its proper divisors (778082140).

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

622465640 is a wasteful number, since it uses less digits than its factorization.

622465640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15561652 (or 15561648 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 622465640 is about 24949.2613117102. The cubic root of 622465640 is about 853.8307558589.

The spelling of 622465640 in words is "six hundred twenty-two million, four hundred sixty-five thousand, six hundred forty".