86643472 has 10 divisors (see below), whose sum is σ = 167871758. Its totient is φ = 43321728.

The previous prime is 86643467. The next prime is 86643493. The reversal of 86643472 is 27434668.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 61402896 + 25240576 = 7836^2 + 5024^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2707593 + ... + 2707624.

Almost surely, 2^86643472 is an apocalyptic number.

It is an amenable number.

86643472 is a deficient number, since it is larger than the sum of its proper divisors (81228286).

86643472 is a wasteful number, since it uses less digits than its factorization.

86643472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5415225 (or 5415219 counting only the distinct ones).

The product of its digits is 193536, while the sum is 40.

The square root of 86643472 is about 9308.2475257161. The cubic root of 86643472 is about 442.4986489580.

The spelling of 86643472 in words is "eighty-six million, six hundred forty-three thousand, four hundred seventy-two".