8539897020 has 24 divisors (see below), whose sum is σ = 23911711824. Its totient is φ = 2277305856.

The previous prime is 8539897013. The next prime is 8539897021. The reversal of 8539897020 is 207989358.

It is a super-2 number, since 2×8539897020² (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 (8539897021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71165749 + ... + 71165868.

It is an arithmetic number, because the mean of its divisors is an integer number (996321326).

Almost surely, 2^8539897020 is an apocalyptic number.

It is an amenable number.

8539897020 is an abundant number, since it is smaller than the sum of its proper divisors (15371814804).

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

8539897020 is a wasteful number, since it uses less digits than its factorization.

8539897020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142331629 (or 142331627 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 51.

The square root of 8539897020 is about 92411.5632375083. The cubic root of 8539897020 is about 2044.0156245016.

The spelling of 8539897020 in words is "eight billion, five hundred thirty-nine million, eight hundred ninety-seven thousand, twenty".