86645128 has 8 divisors (see below), whose sum is σ = 162459630. Its totient is φ = 43322560.

The previous prime is 86645113. The next prime is 86645161. The reversal of 86645128 is 82154668.

It can be written as a sum of positive squares in only one way, i.e., 63393444 + 23251684 = 7962^2 + 4822^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×86645128² = 15014756412272768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5415313 + ... + 5415328.

Almost surely, 2^86645128 is an apocalyptic number.

It is an amenable number.

86645128 is a deficient number, since it is larger than the sum of its proper divisors (75814502).

86645128 is a wasteful number, since it uses less digits than its factorization.

86645128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10830647 (or 10830643 counting only the distinct ones).

The product of its digits is 92160, while the sum is 40.

The square root of 86645128 is about 9308.3364786626. The cubic root of 86645128 is about 442.5014680705.

The spelling of 86645128 in words is "eighty-six million, six hundred forty-five thousand, one hundred twenty-eight".