30506208 has 24 divisors (see below), whose sum is σ = 80079048. Its totient is φ = 10168704.

The previous prime is 30506197. The next prime is 30506213. The reversal of 30506208 is 80260503.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

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 3 ways as a sum of consecutive naturals, for example, 158791 + ... + 158982.

It is an arithmetic number, because the mean of its divisors is an integer number (3336627).

Almost surely, 2^30506208 is an apocalyptic number.

It is an amenable number.

30506208 is an abundant number, since it is smaller than the sum of its proper divisors (49572840).

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

30506208 is a wasteful number, since it uses less digits than its factorization.

30506208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317786 (or 317778 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 30506208 is about 5523.2425259081. The cubic root of 30506208 is about 312.4611851524.

The spelling of 30506208 in words is "thirty million, five hundred six thousand, two hundred eight".