86136820 has 48 divisors (see below), whose sum is σ = 225525888. Its totient is φ = 26847360.

The previous prime is 86136797. The next prime is 86136821. The reversal of 86136820 is 2863168.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86136821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26427 + ... + 29506.

It is an arithmetic number, because the mean of its divisors is an integer number (4698456).

Almost surely, 2^86136820 is an apocalyptic number.

It is an amenable number.

86136820 is an abundant number, since it is smaller than the sum of its proper divisors (139389068).

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

86136820 is a wasteful number, since it uses less digits than its factorization.

86136820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55960 (or 55958 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 86136820 is about 9280.9924038327. The cubic root of 86136820 is about 441.6344513507.

Adding to 86136820 its reverse (2863168), we get a palindrome (88999988).

The spelling of 86136820 in words is "eighty-six million, one hundred thirty-six thousand, eight hundred twenty".