30388288 has 56 divisors (see below), whose sum is σ = 71323200. Its totient is φ = 12569088.

The previous prime is 30388279. The next prime is 30388289. The reversal of 30388288 is 88288303.

It is a tau number, because it is divible by the number of its divisors (56).

It is a self number, because there is not a number n which added to its sum of digits gives 30388288.

It is not an unprimeable number, because it can be changed into a prime (30388289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11823 + ... + 14161.

Almost surely, 2^30388288 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30388288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35661600).

30388288 is an abundant number, since it is smaller than the sum of its proper divisors (40934912).

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

30388288 is a wasteful number, since it uses less digits than its factorization.

30388288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2387 (or 2377 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 30388288 is about 5512.5573012895. The cubic root of 30388288 is about 312.0580650204.

The spelling of 30388288 in words is "thirty million, three hundred eighty-eight thousand, two hundred eighty-eight".