30821076 has 72 divisors (see below), whose sum is σ = 91544544. Its totient is φ = 8619840.

The previous prime is 30821057. The next prime is 30821093. The reversal of 30821076 is 67012803.

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 23 ways as a sum of consecutive naturals, for example, 2155 + ... + 8141.

It is an arithmetic number, because the mean of its divisors is an integer number (1271452).

Almost surely, 2^30821076 is an apocalyptic number.

30821076 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30821076, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45772272).

30821076 is an abundant number, since it is smaller than the sum of its proper divisors (60723468).

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

30821076 is a wasteful number, since it uses less digits than its factorization.

30821076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6021 (or 6016 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 30821076 is about 5551.6732612790. The cubic root of 30821076 is about 313.5325241166.

Adding to 30821076 its reverse (67012803), we get a palindrome (97833879).

The spelling of 30821076 in words is "thirty million, eight hundred twenty-one thousand, seventy-six".