8197623138 has 16 divisors (see below), whose sum is σ = 16403472000. Its totient is φ = 2731170096.

The previous prime is 8197623121. The next prime is 8197623139. The reversal of 8197623138 is 8313267918.

It is a super-2 number, since 2×8197623138² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8197623139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 329745 + ... + 353732.

It is an arithmetic number, because the mean of its divisors is an integer number (1025217000).

Almost surely, 2^8197623138 is an apocalyptic number.

8197623138 is an abundant number, since it is smaller than the sum of its proper divisors (8205848862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8197623138 is a wasteful number, since it uses less digits than its factorization.

8197623138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685481.

The product of its digits is 435456, while the sum is 48.

The square root of 8197623138 is about 90540.7264053034. The cubic root of 8197623138 is about 2016.3348184728.

The spelling of 8197623138 in words is "eight billion, one hundred ninety-seven million, six hundred twenty-three thousand, one hundred thirty-eight".