30122540 has 24 divisors (see below), whose sum is σ = 72294432. Its totient is φ = 10327680.

The previous prime is 30122507. The next prime is 30122569. The reversal of 30122540 is 4522103.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107441 + ... + 107720.

It is an arithmetic number, because the mean of its divisors is an integer number (3012268).

Almost surely, 2^30122540 is an apocalyptic number.

It is an amenable number.

30122540 is an abundant number, since it is smaller than the sum of its proper divisors (42171892).

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

30122540 is a wasteful number, since it uses less digits than its factorization.

30122540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215177 (or 215175 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 30122540 is about 5488.4004955907. The cubic root of 30122540 is about 311.1457428379.

Adding to 30122540 its reverse (4522103), we get a palindrome (34644643).

The spelling of 30122540 in words is "thirty million, one hundred twenty-two thousand, five hundred forty".