86515240 has 64 divisors (see below), whose sum is σ = 226281600. Its totient is φ = 29154048.

The previous prime is 86515229. The next prime is 86515241. The reversal of 86515240 is 4251568.

It is not an unprimeable number, because it can be changed into a prime (86515241) 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, 13902 + ... + 19138.

It is an arithmetic number, because the mean of its divisors is an integer number (3535650).

Almost surely, 2^86515240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86515240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113140800).

86515240 is an abundant number, since it is smaller than the sum of its proper divisors (139766360).

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

86515240 is a wasteful number, since it uses less digits than its factorization.

86515240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5314 (or 5310 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 86515240 is about 9301.3568902607. The cubic root of 86515240 is about 442.2802424184.

The spelling of 86515240 in words is "eighty-six million, five hundred fifteen thousand, two hundred forty".