30020540 has 48 divisors (see below), whose sum is σ = 69933024. Its totient is φ = 10732800.

The previous prime is 30020527. The next prime is 30020561. The reversal of 30020540 is 4502003.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 12302 + ... + 14538.

It is an arithmetic number, because the mean of its divisors is an integer number (1456938).

Almost surely, 2^30020540 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 30020540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34966512).

30020540 is an abundant number, since it is smaller than the sum of its proper divisors (39912484).

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

30020540 is a wasteful number, since it uses less digits than its factorization.

30020540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318 (or 2316 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 30020540 is about 5479.1002911062. The cubic root of 30020540 is about 310.7941483681.

Adding to 30020540 its reverse (4502003), we get a palindrome (34522543).

The spelling of 30020540 in words is "thirty million, twenty thousand, five hundred forty".