30120808 has 8 divisors (see below), whose sum is σ = 56476530. Its totient is φ = 15060400.

The previous prime is 30120803. The next prime is 30120817. The reversal of 30120808 is 80802103.

It can be written as a sum of positive squares in only one way, i.e., 25786084 + 4334724 = 5078^2 + 2082^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (30120803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1882543 + ... + 1882558.

Almost surely, 2^30120808 is an apocalyptic number.

It is an amenable number.

30120808 is a deficient number, since it is larger than the sum of its proper divisors (26355722).

30120808 is a wasteful number, since it uses less digits than its factorization.

30120808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3765107 (or 3765103 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 30120808 is about 5488.2427060034. The cubic root of 30120808 is about 311.1397792554.

The spelling of 30120808 in words is "thirty million, one hundred twenty thousand, eight hundred eight".