30208212 has 18 divisors (see below), whose sum is σ = 76359738. Its totient is φ = 10069392.

The previous prime is 30208181. The next prime is 30208247. The reversal of 30208212 is 21280203.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 30074256 + 133956 = 5484^2 + 366^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

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 5 ways as a sum of consecutive naturals, for example, 419523 + ... + 419594.

Almost surely, 2^30208212 is an apocalyptic number.

It is an amenable number.

30208212 is an abundant number, since it is smaller than the sum of its proper divisors (46151526).

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

30208212 is a wasteful number, since it uses less digits than its factorization.

30208212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839127 (or 839122 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 30208212 is about 5496.1997780285. The cubic root of 30208212 is about 311.4404418303.

Adding to 30208212 its reverse (21280203), we get a palindrome (51488415).

The spelling of 30208212 in words is "thirty million, two hundred eight thousand, two hundred twelve".