422445618 has 160 divisors (see below), whose sum is σ = 1140784128. Its totient is φ = 114307200.

The previous prime is 422445607. The next prime is 422445619. The reversal of 422445618 is 816544224.

It is not an unprimeable number, because it can be changed into a prime (422445619) 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 79 ways as a sum of consecutive naturals, for example, 2144296 + ... + 2144492.

Almost surely, 2^422445618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 422445618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (570392064).

422445618 is an abundant number, since it is smaller than the sum of its proper divisors (718338510).

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

422445618 is a wasteful number, since it uses less digits than its factorization.

422445618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 301 counting only the distinct ones).

The product of its digits is 61440, while the sum is 36.

The square root of 422445618 is about 20553.4818948031. The cubic root of 422445618 is about 750.3379916593.

It can be divided in two parts, 422 and 445618, that added together give a triangular number (446040 = T₉₄₄).

The spelling of 422445618 in words is "four hundred twenty-two million, four hundred forty-five thousand, six hundred eighteen".