8130394 has 4 divisors (see below), whose sum is σ = 12195594. Its totient is φ = 4065196.

The previous prime is 8130391. The next prime is 8130427. The reversal of 8130394 is 4930318.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4930318 = 2 ⋅2465159.

It can be written as a sum of positive squares in only one way, i.e., 7980625 + 149769 = 2825^2 + 387^2 .

It is a super-2 number, since 2×8130394² = 132206613190472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8130391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2032597 + ... + 2032600.

Almost surely, 2^8130394 is an apocalyptic number.

8130394 is a deficient number, since it is larger than the sum of its proper divisors (4065200).

8130394 is a wasteful number, since it uses less digits than its factorization.

8130394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4065199.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 8130394 is about 2851.3845759560. The cubic root of 8130394 is about 201.0807658724.

The spelling of 8130394 in words is "eight million, one hundred thirty thousand, three hundred ninety-four".