30820866 has 8 divisors (see below), whose sum is σ = 61641744. Its totient is φ = 10273620.

The previous prime is 30820849. The next prime is 30820879. The reversal of 30820866 is 66802803.

It is a sphenic number, since it is the product of 3 distinct primes.

30820866 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2568400 + ... + 2568411.

It is an arithmetic number, because the mean of its divisors is an integer number (7705218).

Almost surely, 2^30820866 is an apocalyptic number.

30820866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

30820866 is a wasteful number, since it uses less digits than its factorization.

30820866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5136816.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 30820866 is about 5551.6543480300. The cubic root of 30820866 is about 313.5318120284.

The spelling of 30820866 in words is "thirty million, eight hundred twenty thousand, eight hundred sixty-six".