86581540 has 24 divisors (see below), whose sum is σ = 182129472. Its totient is φ = 34573920.

The previous prime is 86581513. The next prime is 86581541. The reversal of 86581540 is 4518568.

It is a self number, because there is not a number n which added to its sum of digits gives 86581540.

It is not an unprimeable number, because it can be changed into a prime (86581541) 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, 9595 + ... + 16285.

It is an arithmetic number, because the mean of its divisors is an integer number (7588728).

Almost surely, 2^86581540 is an apocalyptic number.

It is an amenable number.

86581540 is an abundant number, since it is smaller than the sum of its proper divisors (95547932).

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

86581540 is a wasteful number, since it uses less digits than its factorization.

86581540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7347 (or 7345 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 86581540 is about 9304.9202038491. The cubic root of 86581540 is about 442.3931924326.

The spelling of 86581540 in words is "eighty-six million, five hundred eighty-one thousand, five hundred forty".