30821029 has 8 divisors (see below), whose sum is σ = 31555008. Its totient is φ = 30095520.

The previous prime is 30820987. The next prime is 30821039. The reversal of 30821029 is 92012803.

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 30821029 - 2⁷ = 30820901 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30820994 and 30821012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30821039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5569 + ... + 9625.

It is an arithmetic number, because the mean of its divisors is an integer number (3944376).

Almost surely, 2^30821029 is an apocalyptic number.

It is an amenable number.

30821029 is a deficient number, since it is larger than the sum of its proper divisors (733979).

30821029 is a wasteful number, since it uses less digits than its factorization.

30821029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4235.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 30821029 is about 5551.6690283193. The cubic root of 30821029 is about 313.5323647448.

The spelling of 30821029 in words is "thirty million, eight hundred twenty-one thousand, twenty-nine".