8478538 has 4 divisors (see below), whose sum is σ = 12717810. Its totient is φ = 4239268.

The previous prime is 8478523. The next prime is 8478539. The reversal of 8478538 is 8358748.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 8450649 + 27889 = 2907^2 + 167^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 8478494 and 8478503.

It is not an unprimeable number, because it can be changed into a prime (8478539) 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 as a sum of consecutive naturals, namely, 2119633 + ... + 2119636.

Almost surely, 2^8478538 is an apocalyptic number.

8478538 is a deficient number, since it is larger than the sum of its proper divisors (4239272).

8478538 is a wasteful number, since it uses less digits than its factorization.

8478538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4239271.

The product of its digits is 215040, while the sum is 43.

The square root of 8478538 is about 2911.7929184611. The cubic root of 8478538 is about 203.9108446761.

The spelling of 8478538 in words is "eight million, four hundred seventy-eight thousand, five hundred thirty-eight".