86681020 has 24 divisors (see below), whose sum is σ = 189945504. Its totient is φ = 33164736.

The previous prime is 86680981. The next prime is 86681027. The reversal of 86681020 is 2018668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86681027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93759 + ... + 94678.

It is an arithmetic number, because the mean of its divisors is an integer number (7914396).

Almost surely, 2^86681020 is an apocalyptic number.

It is an amenable number.

86681020 is an abundant number, since it is smaller than the sum of its proper divisors (103264484).

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

86681020 is a wasteful number, since it uses less digits than its factorization.

86681020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188469 (or 188467 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 86681020 is about 9310.2642282590. The cubic root of 86681020 is about 442.5625604463.

Adding to 86681020 its reverse (2018668), we get a palindrome (88699688).

The spelling of 86681020 in words is "eighty-six million, six hundred eighty-one thousand, twenty".