8518469438 has 4 divisors (see below), whose sum is σ = 12777704160. Its totient is φ = 4259234718.

The previous prime is 8518469437. The next prime is 8518469441. The reversal of 8518469438 is 8349648158.

It is a happy number.

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

It is a super-2 number, since 2×8518469438² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8518469437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2129617358 + ... + 2129617361.

It is an arithmetic number, because the mean of its divisors is an integer number (3194426040).

Almost surely, 2^8518469438 is an apocalyptic number.

8518469438 is a deficient number, since it is larger than the sum of its proper divisors (4259234722).

8518469438 is a wasteful number, since it uses less digits than its factorization.

8518469438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4259234721.

The product of its digits is 6635520, while the sum is 56.

The square root of 8518469438 is about 92295.5548117026. The cubic root of 8518469438 is about 2042.3046360625.

The spelling of 8518469438 in words is "eight billion, five hundred eighteen million, four hundred sixty-nine thousand, four hundred thirty-eight".