422406388 has 6 divisors (see below), whose sum is σ = 739211186. Its totient is φ = 211203192.

The previous prime is 422406337. The next prime is 422406389. The reversal of 422406388 is 883604224.

It can be written as a sum of positive squares in only one way, i.e., 411197284 + 11209104 = 20278^2 + 3348^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422406389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52800795 + ... + 52800802.

Almost surely, 2^422406388 is an apocalyptic number.

It is an amenable number.

422406388 is a deficient number, since it is larger than the sum of its proper divisors (316804798).

422406388 is a wasteful number, since it uses less digits than its factorization.

422406388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105601601 (or 105601599 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 37.

The square root of 422406388 is about 20552.5275331284. The cubic root of 422406388 is about 750.3147644719.

The spelling of 422406388 in words is "four hundred twenty-two million, four hundred six thousand, three hundred eighty-eight".