86439936 has 96 divisors (see below), whose sum is σ = 251596800. Its totient is φ = 26173440.

The previous prime is 86439919. The next prime is 86439937. The reversal of 86439936 is 63993468.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86439937) 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, 66945 + ... + 68223.

It is an arithmetic number, because the mean of its divisors is an integer number (2620800).

Almost surely, 2^86439936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86439936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125798400).

86439936 is an abundant number, since it is smaller than the sum of its proper divisors (165156864).

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

86439936 is a wasteful number, since it uses less digits than its factorization.

86439936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315 (or 1295 counting only the distinct ones).

The product of its digits is 839808, while the sum is 48.

The square root of 86439936 is about 9297.3079974797. The cubic root of 86439936 is about 442.1518829940.

The spelling of 86439936 in words is "eighty-six million, four hundred thirty-nine thousand, nine hundred thirty-six".