30684528 has 160 divisors (see below), whose sum is σ = 102771200. Its totient is φ = 8584704.

The previous prime is 30684431. The next prime is 30684529. The reversal of 30684528 is 82548603.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 30684492 and 30684501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30684529) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 220683 + ... + 220821.

It is an arithmetic number, because the mean of its divisors is an integer number (642320).

Almost surely, 2^30684528 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 30684528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51385600).

30684528 is an abundant number, since it is smaller than the sum of its proper divisors (72086672).

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

30684528 is a wasteful number, since it uses less digits than its factorization.

30684528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 30684528 is about 5539.3616960802. The cubic root of 30684528 is about 313.0688195669.

The spelling of 30684528 in words is "thirty million, six hundred eighty-four thousand, five hundred twenty-eight".