30105288 has 24 divisors (see below), whose sum is σ = 81535350. Its totient is φ = 10035072.

The previous prime is 30105209. The next prime is 30105307. The reversal of 30105288 is 88250103.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 28708164 + 1397124 = 5358^2 + 1182^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 208993 + ... + 209136.

Almost surely, 2^30105288 is an apocalyptic number.

It is an amenable number.

30105288 is an abundant number, since it is smaller than the sum of its proper divisors (51430062).

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

30105288 is a wasteful number, since it uses less digits than its factorization.

30105288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418141 (or 418134 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 30105288 is about 5486.8285921833. The cubic root of 30105288 is about 311.0863309439.

The spelling of 30105288 in words is "thirty million, one hundred five thousand, two hundred eighty-eight".