8371221738 has 16 divisors (see below), whose sum is σ = 18264483936. Its totient is φ = 2536733840.

The previous prime is 8371221721. The next prime is 8371221743.

8371221738 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 8371221738.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63418281 + ... + 63418412.

It is an arithmetic number, because the mean of its divisors is an integer number (1141530246).

Almost surely, 2^8371221738 is an apocalyptic number.

8371221738 is an abundant number, since it is smaller than the sum of its proper divisors (9893262198).

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

8371221738 is a wasteful number, since it uses less digits than its factorization.

8371221738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126836709.

The product of its digits is 112896, while the sum is 42.

The square root of 8371221738 is about 91494.3809094307. The cubic root of 8371221738 is about 2030.4686193557.

The spelling of 8371221738 in words is "eight billion, three hundred seventy-one million, two hundred twenty-one thousand, seven hundred thirty-eight".