86443578 has 64 divisors (see below), whose sum is σ = 217795200. Its totient is φ = 25194240.

The previous prime is 86443573. The next prime is 86443579. The reversal of 86443578 is 87534468.

It is not an unprimeable number, because it can be changed into a prime (86443571) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10098 + ... + 16578.

It is an arithmetic number, because the mean of its divisors is an integer number (3403050).

Almost surely, 2^86443578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86443578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108897600).

86443578 is an abundant number, since it is smaller than the sum of its proper divisors (131351622).

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

86443578 is a wasteful number, since it uses less digits than its factorization.

86443578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6524 (or 6518 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 86443578 is about 9297.5038585633. The cubic root of 86443578 is about 442.1580926799.

The spelling of 86443578 in words is "eighty-six million, four hundred forty-three thousand, five hundred seventy-eight".