30804930 has 96 divisors (see below), whose sum is σ = 87390576. Its totient is φ = 7483392.

The previous prime is 30804929. The next prime is 30804937. The reversal of 30804930 is 3940803.

It can be written as a sum of positive squares in 8 ways, for example, as 35721 + 30769209 = 189^2 + 5547^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 30804894 and 30804903.

It is not an unprimeable number, because it can be changed into a prime (30804937) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 132094 + ... + 132326.

Almost surely, 2^30804930 is an apocalyptic number.

30804930 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 30804930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43695288).

30804930 is an abundant number, since it is smaller than the sum of its proper divisors (56585646).

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

30804930 is a wasteful number, since it uses less digits than its factorization.

30804930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372 (or 369 counting only the distinct ones).

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

The square root of 30804930 is about 5550.2189146015. The cubic root of 30804930 is about 313.4777652629.

The spelling of 30804930 in words is "thirty million, eight hundred four thousand, nine hundred thirty".