422520644 has 24 divisors (see below), whose sum is σ = 910045248. Its totient is φ = 167150880.

The previous prime is 422520643. The next prime is 422520661. The reversal of 422520644 is 446025224.

It is not an unprimeable number, because it can be changed into a prime (422520643) 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, 580022 + ... + 580749.

It is an arithmetic number, because the mean of its divisors is an integer number (37918552).

Almost surely, 2^422520644 is an apocalyptic number.

It is an amenable number.

422520644 is an abundant number, since it is smaller than the sum of its proper divisors (487524604).

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

422520644 is a wasteful number, since it uses less digits than its factorization.

422520644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160795 (or 1160793 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 422520644 is about 20555.3069546529. The cubic root of 422520644 is about 750.3824088367.

Adding to 422520644 its reverse (446025224), we get a palindrome (868545868).

The spelling of 422520644 in words is "four hundred twenty-two million, five hundred twenty thousand, six hundred forty-four".