30642808 has 64 divisors (see below), whose sum is σ = 70479360. Its totient is φ = 12203136.

The previous prime is 30642793. The next prime is 30642811. The reversal of 30642808 is 80824603.

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 30642808.

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 15 ways as a sum of consecutive naturals, for example, 47335 + ... + 47977.

It is an arithmetic number, because the mean of its divisors is an integer number (1101240).

Almost surely, 2^30642808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30642808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35239680).

30642808 is an abundant number, since it is smaller than the sum of its proper divisors (39836552).

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

30642808 is a wasteful number, since it uses less digits than its factorization.

30642808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716 (or 712 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 30642808 is about 5535.5946383383. The cubic root of 30642808 is about 312.9268679492.

The spelling of 30642808 in words is "thirty million, six hundred forty-two thousand, eight hundred eight".