8315138 has 24 divisors (see below), whose sum is σ = 13731588. Its totient is φ = 3773952.

The previous prime is 8315137. The next prime is 8315143.

8315138 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 6 ways, for example, as 769129 + 7546009 = 877^2 + 2747^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 8315138.

It is not an unprimeable number, because it can be changed into a prime (8315137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24506 + ... + 24842.

Almost surely, 2^8315138 is an apocalyptic number.

8315138 is a deficient number, since it is larger than the sum of its proper divisors (5416450).

8315138 is a wasteful number, since it uses less digits than its factorization.

8315138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438 (or 425 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 8315138 is about 2883.5980995971. The cubic root of 8315138 is about 202.5924020711.

The spelling of 8315138 in words is "eight million, three hundred fifteen thousand, one hundred thirty-eight".