86281720 has 32 divisors (see below), whose sum is σ = 221868000. Its totient is φ = 29582208.

The previous prime is 86281703. The next prime is 86281733. The reversal of 86281720 is 2718268.

It is a super-3 number, since 3×86281720³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 153795 + ... + 154354.

It is an arithmetic number, because the mean of its divisors is an integer number (6933375).

Almost surely, 2^86281720 is an apocalyptic number.

It is an amenable number.

86281720 is an abundant number, since it is smaller than the sum of its proper divisors (135586280).

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

86281720 is a wasteful number, since it uses less digits than its factorization.

86281720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308167 (or 308163 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 86281720 is about 9288.7954009118. The cubic root of 86281720 is about 441.8819528737.

Adding to 86281720 its reverse (2718268), we get a palindrome (88999988).

The spelling of 86281720 in words is "eighty-six million, two hundred eighty-one thousand, seven hundred twenty".