86405439 has 4 divisors (see below), whose sum is σ = 115207256. Its totient is φ = 57603624.

The previous prime is 86405419. The next prime is 86405453. The reversal of 86405439 is 93450468.

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

It is not a de Polignac number, because 86405439 - 2¹¹ = 86403391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86405397 and 86405406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86405419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14400904 + ... + 14400909.

It is an arithmetic number, because the mean of its divisors is an integer number (28801814).

Almost surely, 2^86405439 is an apocalyptic number.

86405439 is a deficient number, since it is larger than the sum of its proper divisors (28801817).

86405439 is a wasteful number, since it uses less digits than its factorization.

86405439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28801816.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 86405439 is about 9295.4525979104. The cubic root of 86405439 is about 442.0930562382.

The spelling of 86405439 in words is "eighty-six million, four hundred five thousand, four hundred thirty-nine".