30528020 has 12 divisors (see below), whose sum is σ = 64108884. Its totient is φ = 12211200.

The previous prime is 30528011. The next prime is 30528119. The reversal of 30528020 is 2082503.

It can be written as a sum of positive squares in 2 ways, for example, as 19465744 + 11062276 = 4412^2 + 3326^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1526401 = 30528020 / (3 + 0 + 5 + 2 + 8 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 30527983 and 30528001.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 763181 + ... + 763220.

It is an arithmetic number, because the mean of its divisors is an integer number (5342407).

Almost surely, 2^30528020 is an apocalyptic number.

It is an amenable number.

30528020 is an abundant number, since it is smaller than the sum of its proper divisors (33580864).

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

30528020 is a wasteful number, since it uses less digits than its factorization.

30528020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526410 (or 1526408 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 30528020 is about 5525.2167378303. The cubic root of 30528020 is about 312.5356375357.

The spelling of 30528020 in words is "thirty million, five hundred twenty-eight thousand, twenty".