30303040 has 56 divisors (see below), whose sum is σ = 72630792. Its totient is φ = 12042240.

The previous prime is 30303017. The next prime is 30303067. The reversal of 30303040 is 4030303.

It can be written as a sum of positive squares in 4 ways, for example, as 2509056 + 27793984 = 1584^2 + 5272^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30303040.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89752 + ... + 90088.

Almost surely, 2^30303040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30303040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36315396).

30303040 is an abundant number, since it is smaller than the sum of its proper divisors (42327752).

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

30303040 is a wasteful number, since it uses less digits than its factorization.

30303040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635 (or 625 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 13.

The square root of 30303040 is about 5504.8197064027. The cubic root of 30303040 is about 311.7659871369.

Adding to 30303040 its reverse (4030303), we get a palindrome (34333343).

The spelling of 30303040 in words is "thirty million, three hundred three thousand, forty".