422620818 has 8 divisors (see below), whose sum is σ = 845241648. Its totient is φ = 140873604.

The previous prime is 422620777. The next prime is 422620841. The reversal of 422620818 is 818026224.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

422620818 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35218396 + ... + 35218407.

It is an arithmetic number, because the mean of its divisors is an integer number (105655206).

Almost surely, 2^422620818 is an apocalyptic number.

422620818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

422620818 is a wasteful number, since it uses less digits than its factorization.

422620818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70436808.

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 422620818 is about 20557.7435045775. The cubic root of 422620818 is about 750.4417060322.

The spelling of 422620818 in words is "four hundred twenty-two million, six hundred twenty thousand, eight hundred eighteen".