8115389 has 10 divisors (see below), whose sum is σ = 8776830. Its totient is φ = 7494872.

The previous prime is 8115383. The next prime is 8115403. The reversal of 8115389 is 9835118.

It can be written as a sum of positive squares in only one way, i.e., 6996025 + 1119364 = 2645^2 + 1058^2 .

It is a de Polignac number, because none of the positive numbers 2^k-8115389 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8115383) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 279827 + ... + 279855.

It is an arithmetic number, because the mean of its divisors is an integer number (877683).

Almost surely, 2^8115389 is an apocalyptic number.

It is an amenable number.

8115389 is a deficient number, since it is larger than the sum of its proper divisors (661441).

8115389 is an frugal number, since it uses more digits than its factorization.

8115389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 52 counting only the distinct ones).

The product of its digits is 8640, while the sum is 35.

The square root of 8115389 is about 2848.7521829742. The cubic root of 8115389 is about 200.9569885608.

The spelling of 8115389 in words is "eight million, one hundred fifteen thousand, three hundred eighty-nine".