930221028 has 72 divisors (see below), whose sum is σ = 2716066080. Its totient is φ = 265301760.

The previous prime is 930221003. The next prime is 930221041. The reversal of 930221028 is 820122039.

It is a happy number.

It is a super-2 number, since 2×930221028² = 1730622321866753568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 930220992 and 930221010.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62358 + ... + 75821.

It is an arithmetic number, because the mean of its divisors is an integer number (37723140).

Almost surely, 2^930221028 is an apocalyptic number.

It is an amenable number.

930221028 is an abundant number, since it is smaller than the sum of its proper divisors (1785845052).

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

930221028 is a wasteful number, since it uses less digits than its factorization.

930221028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138217 (or 138212 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 930221028 is about 30499.5250454823. The cubic root of 930221028 is about 976.1773296553.

The spelling of 930221028 in words is "nine hundred thirty million, two hundred twenty-one thousand, twenty-eight".