30249128 has 64 divisors (see below), whose sum is σ = 71756160. Its totient is φ = 11632896.

The previous prime is 30249119. The next prime is 30249139. The reversal of 30249128 is 82194203.

It is a self number, because there is not a number n which added to its sum of digits gives 30249128.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 26375 + ... + 27497.

It is an arithmetic number, because the mean of its divisors is an integer number (1121190).

Almost surely, 2^30249128 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 30249128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35878080).

30249128 is an abundant number, since it is smaller than the sum of its proper divisors (41507032).

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

30249128 is a wasteful number, since it uses less digits than its factorization.

30249128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186 (or 1182 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 30249128 is about 5499.9207267014. The cubic root of 30249128 is about 311.5809902367.

The spelling of 30249128 in words is "thirty million, two hundred forty-nine thousand, one hundred twenty-eight".