82860866 has 16 divisors (see below), whose sum is σ = 136794528. Its totient is φ = 37329600.

The previous prime is 82860863. The next prime is 82860929. The reversal of 82860866 is 66806828.

It is a super-2 number, since 2×82860866² = 13731846228539912, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82860863) 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, 14180 + ... + 19151.

It is an arithmetic number, because the mean of its divisors is an integer number (8549658).

Almost surely, 2^82860866 is an apocalyptic number.

82860866 is a deficient number, since it is larger than the sum of its proper divisors (53933662).

82860866 is a wasteful number, since it uses less digits than its factorization.

82860866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33457.

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 82860866 is about 9102.7944061151. The cubic root of 82860866 is about 435.9631909278.

The spelling of 82860866 in words is "eighty-two million, eight hundred sixty thousand, eight hundred sixty-six".