30840930 has 96 divisors (see below), whose sum is σ = 85722624. Its totient is φ = 7675008.

The previous prime is 30840919. The next prime is 30840947. The reversal of 30840930 is 3904803.

It is a junction number, because it is equal to n+sod(n) for n = 30840894 and 30840903.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 97132 + ... + 97448.

It is an arithmetic number, because the mean of its divisors is an integer number (892944).

Almost surely, 2^30840930 is an apocalyptic number.

30840930 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 30840930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42861312).

30840930 is an abundant number, since it is smaller than the sum of its proper divisors (54881694).

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

30840930 is a wasteful number, since it uses less digits than its factorization.

30840930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 30840930 is about 5553.4610829644. The cubic root of 30840930 is about 313.5998323723.

The spelling of 30840930 in words is "thirty million, eight hundred forty thousand, nine hundred thirty".