30866 has 16 divisors (see below), whose sum is σ = 53568. Its totient is φ = 13200.

The previous prime is 30859. The next prime is 30869. The reversal of 30866 is 66803.

30866 is an esthetic number in base 11, because in such base its adjacent digits differ by 1.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a nialpdrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30869) by changing a digit.

30866 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476 + ... + 536.

It is an arithmetic number, because the mean of its divisors is an integer number (3348).

2³⁰⁸⁶⁶ is an apocalyptic number.

30866 is a deficient number, since it is larger than the sum of its proper divisors (22702).

30866 is a wasteful number, since it uses less digits than its factorization.

30866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 30866 is about 175.6872220738. The cubic root of 30866 is about 31.3684782453.

Subtracting 30866 from its reverse (66803), we obtain a cube (35937 = 33³).

The spelling of 30866 in words is "thirty thousand, eight hundred sixty-six".