8642221438 has 8 divisors (see below), whose sum is σ = 13001800032. Its totient is φ = 4308288096.

The previous prime is 8642221429. The next prime is 8642221463. The reversal of 8642221438 is 8341222468.

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

It is a self number, because there is not a number n which added to its sum of digits gives 8642221438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6410470 + ... + 6411817.

It is an arithmetic number, because the mean of its divisors is an integer number (1625225004).

Almost surely, 2^8642221438 is an apocalyptic number.

8642221438 is a deficient number, since it is larger than the sum of its proper divisors (4359578594).

8642221438 is a wasteful number, since it uses less digits than its factorization.

8642221438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12822626.

The product of its digits is 147456, while the sum is 40.

The square root of 8642221438 is about 92963.5489748536. The cubic root of 8642221438 is about 2052.1469823102.

The spelling of 8642221438 in words is "eight billion, six hundred forty-two million, two hundred twenty-one thousand, four hundred thirty-eight".