30247220 has 12 divisors (see below), whose sum is σ = 63519204. Its totient is φ = 12098880.

The previous prime is 30247213. The next prime is 30247223. The reversal of 30247220 is 2274203.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18164644 + 12082576 = 4262^2 + 3476^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1512361 = 30247220 / (3 + 0 + 2 + 4 + 7 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 30247192 and 30247201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30247223) 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, 756161 + ... + 756200.

It is an arithmetic number, because the mean of its divisors is an integer number (5293267).

Almost surely, 2^30247220 is an apocalyptic number.

It is an amenable number.

30247220 is an abundant number, since it is smaller than the sum of its proper divisors (33271984).

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

30247220 is a wasteful number, since it uses less digits than its factorization.

30247220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512370 (or 1512368 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 30247220 is about 5499.7472669205. The cubic root of 30247220 is about 311.5744389842.

The spelling of 30247220 in words is "thirty million, two hundred forty-seven thousand, two hundred twenty".