30001220 has 12 divisors (see below), whose sum is σ = 63002604. Its totient is φ = 12000480.

The previous prime is 30001201. The next prime is 30001241. The reversal of 30001220 is 2210003.

It can be written as a sum of positive squares in 2 ways, for example, as 12845056 + 17156164 = 3584^2 + 4142^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30001198 and 30001207.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750011 + ... + 750050.

It is an arithmetic number, because the mean of its divisors is an integer number (5250217).

Almost surely, 2^30001220 is an apocalyptic number.

It is an amenable number.

30001220 is an abundant number, since it is smaller than the sum of its proper divisors (33001384).

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

30001220 is a wasteful number, since it uses less digits than its factorization.

30001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500070 (or 1500068 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 30001220 is about 5477.3369441728. The cubic root of 30001220 is about 310.7274625646.

Adding to 30001220 its reverse (2210003), we get a palindrome (32211223).

The spelling of 30001220 in words is "thirty million, one thousand, two hundred twenty".