30133788 has 12 divisors (see below), whose sum is σ = 70312200. Its totient is φ = 10044592.

The previous prime is 30133787. The next prime is 30133801. The reversal of 30133788 is 88733103.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30133781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1255563 + ... + 1255586.

It is an arithmetic number, because the mean of its divisors is an integer number (5859350).

Almost surely, 2^30133788 is an apocalyptic number.

It is an amenable number.

30133788 is an abundant number, since it is smaller than the sum of its proper divisors (40178412).

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

30133788 is a wasteful number, since it uses less digits than its factorization.

30133788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2511156 (or 2511154 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 30133788 is about 5489.4251065116. The cubic root of 30133788 is about 311.1844661305.

The spelling of 30133788 in words is "thirty million, one hundred thirty-three thousand, seven hundred eighty-eight".