86439855 has 8 divisors (see below), whose sum is σ = 138303792. Its totient is φ = 46101248.

The previous prime is 86439853. The next prime is 86439863. The reversal of 86439855 is 55893468.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 86439855 - 2¹ = 86439853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86439851) 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, 2881314 + ... + 2881343.

It is an arithmetic number, because the mean of its divisors is an integer number (17287974).

Almost surely, 2^86439855 is an apocalyptic number.

86439855 is a deficient number, since it is larger than the sum of its proper divisors (51863937).

86439855 is a wasteful number, since it uses less digits than its factorization.

86439855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5762665.

The product of its digits is 1036800, while the sum is 48.

The square root of 86439855 is about 9297.3036413790. The cubic root of 86439855 is about 442.1517448854.

The spelling of 86439855 in words is "eighty-six million, four hundred thirty-nine thousand, eight hundred fifty-five".