86247820 has 24 divisors (see below), whose sum is σ = 184976064. Its totient is φ = 33764736.

The previous prime is 86247803. The next prime is 86247823. The reversal of 86247820 is 2874268.

It is a self number, because there is not a number n which added to its sum of digits gives 86247820.

It is not an unprimeable number, because it can be changed into a prime (86247823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44937 + ... + 46816.

It is an arithmetic number, because the mean of its divisors is an integer number (7707336).

Almost surely, 2^86247820 is an apocalyptic number.

It is an amenable number.

86247820 is an abundant number, since it is smaller than the sum of its proper divisors (98728244).

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

86247820 is a wasteful number, since it uses less digits than its factorization.

86247820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91809 (or 91807 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 86247820 is about 9286.9704425071. The cubic root of 86247820 is about 441.8240736363.

The spelling of 86247820 in words is "eighty-six million, two hundred forty-seven thousand, eight hundred twenty".