30013540 has 36 divisors (see below), whose sum is σ = 66536316. Its totient is φ = 11370816.

The previous prime is 30013523. The next prime is 30013553. The reversal of 30013540 is 4531003.

It can be written as a sum of positive squares in 2 ways, for example, as 12222016 + 17791524 = 3496^2 + 4218^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5142 + ... + 9298.

It is an arithmetic number, because the mean of its divisors is an integer number (1848231).

Almost surely, 2^30013540 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 30013540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33268158).

30013540 is an abundant number, since it is smaller than the sum of its proper divisors (36522776).

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

30013540 is a wasteful number, since it uses less digits than its factorization.

30013540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4204 (or 4183 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 30013540 is about 5478.4614628562. The cubic root of 30013540 is about 310.7699901512.

Adding to 30013540 its reverse (4531003), we get a palindrome (34544543).

The spelling of 30013540 in words is "thirty million, thirteen thousand, five hundred forty".