86864540 has 24 divisors (see below), whose sum is σ = 208475232. Its totient is φ = 29782080.

The previous prime is 86864539. The next prime is 86864551. The reversal of 86864540 is 4546868.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310091 + ... + 310370.

It is an arithmetic number, because the mean of its divisors is an integer number (8686468).

Almost surely, 2^86864540 is an apocalyptic number.

It is an amenable number.

86864540 is an abundant number, since it is smaller than the sum of its proper divisors (121610692).

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

86864540 is a wasteful number, since it uses less digits than its factorization.

86864540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620477 (or 620475 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 41.

The square root of 86864540 is about 9320.1148061598. The cubic root of 86864540 is about 442.8746696398.

The spelling of 86864540 in words is "eighty-six million, eight hundred sixty-four thousand, five hundred forty".