86643450 has 72 divisors (see below), whose sum is σ = 240329856. Its totient is φ = 22356000.

The previous prime is 86643449. The next prime is 86643457. The reversal of 86643450 is 5434668.

86643450 is a `hidden beast` number, since 8 + 6 + 643 + 4 + 5 + 0 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86643457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10845 + ... + 17055.

Almost surely, 2^86643450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86643450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120164928).

86643450 is an abundant number, since it is smaller than the sum of its proper divisors (153686406).

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

86643450 is a wasteful number, since it uses less digits than its factorization.

86643450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6260 (or 6252 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 86643450 is about 9308.2463439683. The cubic root of 86643450 is about 442.4986115057.

The spelling of 86643450 in words is "eighty-six million, six hundred forty-three thousand, four hundred fifty".