30320220 has 72 divisors (see below), whose sum is σ = 98766864. Its totient is φ = 6929664.

The previous prime is 30320207. The next prime is 30320239. The reversal of 30320220 is 2202303.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 30320196 and 30320205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2217 + ... + 8096.

It is an arithmetic number, because the mean of its divisors is an integer number (1371762).

Almost surely, 2^30320220 is an apocalyptic number.

30320220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30320220 is an abundant number, since it is smaller than the sum of its proper divisors (68446644).

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

30320220 is a wasteful number, since it uses less digits than its factorization.

30320220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10339 (or 10330 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 12.

The square root of 30320220 is about 5506.3799360378. The cubic root of 30320220 is about 311.8248935236.

Adding to 30320220 its reverse (2202303), we get a palindrome (32522523).

The spelling of 30320220 in words is "thirty million, three hundred twenty thousand, two hundred twenty".