86578281 has 16 divisors (see below), whose sum is σ = 128497920. Its totient is φ = 57613680.

The previous prime is 86578249. The next prime is 86578291. The reversal of 86578281 is 18287568.

It is not a de Polignac number, because 86578281 - 2⁵ = 86578249 is a prime.

It is a super-2 number, since 2×86578281² = 14991597481829922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86578201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13936 + ... + 19166.

It is an arithmetic number, because the mean of its divisors is an integer number (8031120).

Almost surely, 2^86578281 is an apocalyptic number.

It is an amenable number.

86578281 is a deficient number, since it is larger than the sum of its proper divisors (41919639).

86578281 is a wasteful number, since it uses less digits than its factorization.

86578281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5853 (or 5847 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 86578281 is about 9304.7450797967. The cubic root of 86578281 is about 442.3876416824.

It can be divided in two parts, 8657 and 8281, that multiplied together give a palindrome (71688617).

The spelling of 86578281 in words is "eighty-six million, five hundred seventy-eight thousand, two hundred eighty-one".