8138398 has 4 divisors (see below), whose sum is σ = 12207600. Its totient is φ = 4069198.

The previous prime is 8138387. The next prime is 8138413. The reversal of 8138398 is 8938318.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 8138398.

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, 2034598 + ... + 2034601.

It is an arithmetic number, because the mean of its divisors is an integer number (3051900).

Almost surely, 2^8138398 is an apocalyptic number.

8138398 is a deficient number, since it is larger than the sum of its proper divisors (4069202).

8138398 is a wasteful number, since it uses less digits than its factorization.

8138398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4069201.

The product of its digits is 41472, while the sum is 40.

The square root of 8138398 is about 2852.7877593680. The cubic root of 8138398 is about 201.1467291617.

The spelling of 8138398 in words is "eight million, one hundred thirty-eight thousand, three hundred ninety-eight".