86647540 has 48 divisors (see below), whose sum is σ = 209284992. Its totient is φ = 29517696.

The previous prime is 86647529. The next prime is 86647541. The reversal of 86647540 is 4574668.

It is a junction number, because it is equal to n+sod(n) for n = 86647493 and 86647502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86647541) 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, 20922 + ... + 24718.

It is an arithmetic number, because the mean of its divisors is an integer number (4360104).

Almost surely, 2^86647540 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 86647540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104642496).

86647540 is an abundant number, since it is smaller than the sum of its proper divisors (122637452).

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

86647540 is a wasteful number, since it uses less digits than its factorization.

86647540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3976 (or 3974 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 86647540 is about 9308.4660390421. The cubic root of 86647540 is about 442.5055741049.

The spelling of 86647540 in words is "eighty-six million, six hundred forty-seven thousand, five hundred forty".