30005388 has 36 divisors (see below), whose sum is σ = 86682960. Its totient is φ = 8572896.

The previous prime is 30005387. The next prime is 30005429. The reversal of 30005388 is 88350003.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (30005387) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59283 + ... + 59786.

It is an arithmetic number, because the mean of its divisors is an integer number (2407860).

Almost surely, 2^30005388 is an apocalyptic number.

It is an amenable number.

30005388 is an abundant number, since it is smaller than the sum of its proper divisors (56677572).

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

30005388 is a wasteful number, since it uses less digits than its factorization.

30005388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119086 (or 119081 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 30005388 is about 5477.7174078260. The cubic root of 30005388 is about 310.7418514471.

The spelling of 30005388 in words is "thirty million, five thousand, three hundred eighty-eight".