86443520 has 40 divisors (see below), whose sum is σ = 207267984. Its totient is φ = 34576384.

The previous prime is 86443501. The next prime is 86443523. The reversal of 86443520 is 2534468.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86443523) 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, 14324 + ... + 19443.

Almost surely, 2^86443520 is an apocalyptic number.

86443520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

86443520 is an abundant number, since it is smaller than the sum of its proper divisors (120824464).

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

86443520 is an equidigital number, since it uses as much as digits as its factorization.

86443520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33790 (or 33774 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 86443520 is about 9297.5007394461. The cubic root of 86443520 is about 442.1579937900.

Adding to 86443520 its reverse (2534468), we get a palindrome (88977988).

The spelling of 86443520 in words is "eighty-six million, four hundred forty-three thousand, five hundred twenty".