30730240 has 48 divisors (see below), whose sum is σ = 73759140. Its totient is φ = 12288000.

The previous prime is 30730223. The next prime is 30730241. The reversal of 30730240 is 4203703.

It can be written as a sum of positive squares in 2 ways, for example, as 30647296 + 82944 = 5536^2 + 288^2 .

It is not an unprimeable number, because it can be changed into a prime (30730241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8740 + ... + 11740.

Almost surely, 2^30730240 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 30730240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36879570).

30730240 is an abundant number, since it is smaller than the sum of its proper divisors (43028900).

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

30730240 is an equidigital number, since it uses as much as digits as its factorization.

30730240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3028 (or 3008 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 19.

The square root of 30730240 is about 5543.4862676839. The cubic root of 30730240 is about 313.2242062512.

Adding to 30730240 its reverse (4203703), we get a palindrome (34933943).

The spelling of 30730240 in words is "thirty million, seven hundred thirty thousand, two hundred forty".