30808820 has 24 divisors (see below), whose sum is σ = 73941504. Its totient is φ = 10562976.

The previous prime is 30808819. The next prime is 30808867. The reversal of 30808820 is 2880803.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109892 + ... + 110171.

It is an arithmetic number, because the mean of its divisors is an integer number (3080896).

Almost surely, 2^30808820 is an apocalyptic number.

It is an amenable number.

30808820 is an abundant number, since it is smaller than the sum of its proper divisors (43132684).

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

30808820 is a wasteful number, since it uses less digits than its factorization.

30808820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220079 (or 220077 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 30808820 is about 5550.5693401668. The cubic root of 30808820 is about 313.4909598737.

The spelling of 30808820 in words is "thirty million, eight hundred eight thousand, eight hundred twenty".