86717646 has 48 divisors (see below), whose sum is σ = 202731984. Its totient is φ = 26687232.

The previous prime is 86717623. The next prime is 86717647. The reversal of 86717646 is 64671768.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86717647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13545 + ... + 18891.

It is an arithmetic number, because the mean of its divisors is an integer number (4223583).

Almost surely, 2^86717646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86717646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101365992).

86717646 is an abundant number, since it is smaller than the sum of its proper divisors (116014338).

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

86717646 is a wasteful number, since it uses less digits than its factorization.

86717646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5425 (or 5422 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 86717646 is about 9312.2309894031. The cubic root of 86717646 is about 442.6248847931.

The spelling of 86717646 in words is "eighty-six million, seven hundred seventeen thousand, six hundred forty-six".