86387240 has 16 divisors (see below), whose sum is σ = 194371380. Its totient is φ = 34554880.

The previous prime is 86387237. The next prime is 86387291. The reversal of 86387240 is 4278368.

It can be written as a sum of positive squares in 2 ways, for example, as 81396484 + 4990756 = 9022^2 + 2234^2 .

It is a super-3 number, since 3×86387240³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 86387194 and 86387203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1079801 + ... + 1079880.

Almost surely, 2^86387240 is an apocalyptic number.

It is an amenable number.

86387240 is an abundant number, since it is smaller than the sum of its proper divisors (107984140).

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

86387240 is a wasteful number, since it uses less digits than its factorization.

86387240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159692 (or 2159688 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 86387240 is about 9294.4736268387. The cubic root of 86387240 is about 442.0620156904.

The spelling of 86387240 in words is "eighty-six million, three hundred eighty-seven thousand, two hundred forty".