30830821 has 8 divisors (see below), whose sum is σ = 35273984. Its totient is φ = 26397360.

The previous prime is 30830801. The next prime is 30830831. The reversal of 30830821 is 12803803.

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

It is a cyclic number.

It is not a de Polignac number, because 30830821 - 2⁷ = 30830693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30830801) 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, 6676 + ... + 10306.

It is an arithmetic number, because the mean of its divisors is an integer number (4409248).

Almost surely, 2^30830821 is an apocalyptic number.

It is an amenable number.

30830821 is a deficient number, since it is larger than the sum of its proper divisors (4443163).

30830821 is a wasteful number, since it uses less digits than its factorization.

30830821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4851.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 30830821 is about 5552.5508552376. The cubic root of 30830821 is about 313.5655648460.

The spelling of 30830821 in words is "thirty million, eight hundred thirty thousand, eight hundred twenty-one".