30240128 has 32 divisors (see below), whose sum is σ = 62195520. Its totient is φ = 14630400.

The previous prime is 30240121. The next prime is 30240131. The reversal of 30240128 is 82104203.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30240121) 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, 158 + ... + 7778.

It is an arithmetic number, because the mean of its divisors is an integer number (1943610).

Almost surely, 2^30240128 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 30240128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31097760).

30240128 is an abundant number, since it is smaller than the sum of its proper divisors (31955392).

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

30240128 is an equidigital number, since it uses as much as digits as its factorization.

30240128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7666 (or 7654 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 30240128 is about 5499.1024722222. The cubic root of 30240128 is about 311.5500856867.

The spelling of 30240128 in words is "thirty million, two hundred forty thousand, one hundred twenty-eight".