30388868 has 12 divisors (see below), whose sum is σ = 55014540. Its totient is φ = 14670432.

The previous prime is 30388829. The next prime is 30388871. The reversal of 30388868 is 86888303.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16386304 + 14002564 = 4048^2 + 3742^2 .

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 3 ways as a sum of consecutive naturals, for example, 130871 + ... + 131102.

It is an arithmetic number, because the mean of its divisors is an integer number (4584545).

Almost surely, 2^30388868 is an apocalyptic number.

It is an amenable number.

30388868 is a deficient number, since it is larger than the sum of its proper divisors (24625672).

30388868 is a wasteful number, since it uses less digits than its factorization.

30388868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262006 (or 262004 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 30388868 is about 5512.6099082014. The cubic root of 30388868 is about 312.0600503524.

The spelling of 30388868 in words is "thirty million, three hundred eighty-eight thousand, eight hundred sixty-eight".