86917720 has 16 divisors (see below), whose sum is σ = 195564960. Its totient is φ = 34767072.

The previous prime is 86917717. The next prime is 86917729. The reversal of 86917720 is 2771968.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 2172943 = 86917720 / (8 + 6 + 9 + 1 + 7 + 7 + 2 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86917729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1086432 + ... + 1086511.

It is an arithmetic number, because the mean of its divisors is an integer number (12222810).

Almost surely, 2^86917720 is an apocalyptic number.

It is an amenable number.

86917720 is an abundant number, since it is smaller than the sum of its proper divisors (108647240).

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

86917720 is a wasteful number, since it uses less digits than its factorization.

86917720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2172954 (or 2172950 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 86917720 is about 9322.9673387822. The cubic root of 86917720 is about 442.9650297577.

The spelling of 86917720 in words is "eighty-six million, nine hundred seventeen thousand, seven hundred twenty".