30693208 has 96 divisors (see below), whose sum is σ = 76129200. Its totient is φ = 11467008.

The previous prime is 30693203. The next prime is 30693241. The reversal of 30693208 is 80239603.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 30693208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30693203) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 96666 + ... + 96982.

Almost surely, 2^30693208 is an apocalyptic number.

30693208 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30693208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38064600).

30693208 is an abundant number, since it is smaller than the sum of its proper divisors (45435992).

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

30693208 is a wasteful number, since it uses less digits than its factorization.

30693208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 30693208 is about 5540.1451244530. The cubic root of 30693208 is about 313.0983369528.

The spelling of 30693208 in words is "thirty million, six hundred ninety-three thousand, two hundred eight".