86817540 has 48 divisors (see below), whose sum is σ = 249665472. Its totient is φ = 22525056.

The previous prime is 86817491. The next prime is 86817547. The reversal of 86817540 is 4571868.

It is not an unprimeable number, because it can be changed into a prime (86817547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17334 + ... + 21773.

It is an arithmetic number, because the mean of its divisors is an integer number (5201364).

Almost surely, 2^86817540 is an apocalyptic number.

It is an amenable number.

86817540 is an abundant number, since it is smaller than the sum of its proper divisors (162847932).

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

86817540 is a wasteful number, since it uses less digits than its factorization.

86817540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39156 (or 39154 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 86817540 is about 9317.5930368309. The cubic root of 86817540 is about 442.7947794846.

The spelling of 86817540 in words is "eighty-six million, eight hundred seventeen thousand, five hundred forty".