30621007928 has 16 divisors (see below), whose sum is σ = 65616445680. Its totient is φ = 13123289088.

The previous prime is 30621007877. The next prime is 30621007939. The reversal of 30621007928 is 82970012603.

It is a super-2 number, since 2×30621007928² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30621007891 and 30621007900.

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, 273401801 + ... + 273401912.

It is an arithmetic number, because the mean of its divisors is an integer number (4101027855).

Almost surely, 2^30621007928 is an apocalyptic number.

It is an amenable number.

30621007928 is an abundant number, since it is smaller than the sum of its proper divisors (34995437752).

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

30621007928 is a wasteful number, since it uses less digits than its factorization.

30621007928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546803726 (or 546803722 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 30621007928 in words is "thirty billion, six hundred twenty-one million, seven thousand, nine hundred twenty-eight".