30821080 has 16 divisors (see below), whose sum is σ = 69347520. Its totient is φ = 12328416.

The previous prime is 30821057. The next prime is 30821093. The reversal of 30821080 is 8012803.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 385224 + ... + 385303.

It is an arithmetic number, because the mean of its divisors is an integer number (4334220).

Almost surely, 2^30821080 is an apocalyptic number.

It is an amenable number.

30821080 is an abundant number, since it is smaller than the sum of its proper divisors (38526440).

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

30821080 is a wasteful number, since it uses less digits than its factorization.

30821080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770538 (or 770534 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 30821080 is about 5551.6736215307. The cubic root of 30821080 is about 313.5325376802.

Adding to 30821080 its reverse (8012803), we get a palindrome (38833883).

The spelling of 30821080 in words is "thirty million, eight hundred twenty-one thousand, eighty".