8539881438 has 16 divisors (see below), whose sum is σ = 18632468736. Its totient is φ = 2587842840.

The previous prime is 8539881433. The next prime is 8539881443. The reversal of 8539881438 is 8341889358.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8539881433) and next prime (8539881443).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8539881433) 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, 64696006 + ... + 64696137.

It is an arithmetic number, because the mean of its divisors is an integer number (1164529296).

Almost surely, 2^8539881438 is an apocalyptic number.

8539881438 is an abundant number, since it is smaller than the sum of its proper divisors (10092587298).

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

8539881438 is a wasteful number, since it uses less digits than its factorization.

8539881438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129392159.

The product of its digits is 6635520, while the sum is 57.

The square root of 8539881438 is about 92411.4789298386. The cubic root of 8539881438 is about 2044.0143813222.

The spelling of 8539881438 in words is "eight billion, five hundred thirty-nine million, eight hundred eighty-one thousand, four hundred thirty-eight".