30813808 has 10 divisors (see below), whose sum is σ = 59701784. Its totient is φ = 15406896.

The previous prime is 30813803. The next prime is 30813817. The reversal of 30813808 is 80831803.

It is a self number, because there is not a number n which added to its sum of digits gives 30813808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30813803) 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 as a sum of consecutive naturals, namely, 962916 + ... + 962947.

Almost surely, 2^30813808 is an apocalyptic number.

It is an amenable number.

30813808 is a deficient number, since it is larger than the sum of its proper divisors (28887976).

30813808 is a wasteful number, since it uses less digits than its factorization.

30813808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1925871 (or 1925865 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 30813808 is about 5551.0186452578. The cubic root of 30813808 is about 313.5078771994.

It can be divided in two parts, 3081 and 3808, that added together give a square (6889 = 83²).

The spelling of 30813808 in words is "thirty million, eight hundred thirteen thousand, eight hundred eight".