30320208 has 30 divisors (see below), whose sum is σ = 84854874. Its totient is φ = 10106688.

The previous prime is 30320207. The next prime is 30320239. The reversal of 30320208 is 80202303.

It can be written as a sum of positive squares in only one way, i.e., 27123264 + 3196944 = 5208^2 + 1788^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30320207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105135 + ... + 105422.

Almost surely, 2^30320208 is an apocalyptic number.

It is an amenable number.

30320208 is an abundant number, since it is smaller than the sum of its proper divisors (54534666).

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

30320208 is a wasteful number, since it uses less digits than its factorization.

30320208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210571 (or 210562 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 30320208 is about 5506.3788463926. The cubic root of 30320208 is about 311.8248523860.

The spelling of 30320208 in words is "thirty million, three hundred twenty thousand, two hundred eight".