30855689 has 4 divisors (see below), whose sum is σ = 30990660. Its totient is φ = 30720720.

The previous prime is 30855661. The next prime is 30855703. The reversal of 30855689 is 98655803.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98655803 = 43 ⋅2294321.

It can be written as a sum of positive squares in 2 ways, for example, as 12020089 + 18835600 = 3467^2 + 4340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30855689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30855619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67142 + ... + 67599.

It is an arithmetic number, because the mean of its divisors is an integer number (7747665).

Almost surely, 2^30855689 is an apocalyptic number.

It is an amenable number.

30855689 is a deficient number, since it is larger than the sum of its proper divisors (134971).

30855689 is a wasteful number, since it uses less digits than its factorization.

30855689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134970.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 30855689 is about 5554.7897349945. The cubic root of 30855689 is about 313.6498490418.

The spelling of 30855689 in words is "thirty million, eight hundred fifty-five thousand, six hundred eighty-nine".