8422438 has 4 divisors (see below), whose sum is σ = 12633660. Its totient is φ = 4211218.

The previous prime is 8422411. The next prime is 8422451. The reversal of 8422438 is 8342248.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2105608 + ... + 2105611.

It is an arithmetic number, because the mean of its divisors is an integer number (3158415).

Almost surely, 2^8422438 is an apocalyptic number.

8422438 is a deficient number, since it is larger than the sum of its proper divisors (4211222).

8422438 is a wasteful number, since it uses less digits than its factorization.

8422438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4211221.

The product of its digits is 12288, while the sum is 31.

The square root of 8422438 is about 2902.1436904468. The cubic root of 8422438 is about 203.4601096585.

It can be divided in two parts, 84 and 22438, that added together give a palindrome (22522).

The spelling of 8422438 in words is "eight million, four hundred twenty-two thousand, four hundred thirty-eight".