30528369 has 6 divisors (see below), whose sum is σ = 44096546. Its totient is φ = 20352240.

The previous prime is 30528353. The next prime is 30528373. The reversal of 30528369 is 96382503.

It can be written as a sum of positive squares in only one way, i.e., 21902400 + 8625969 = 4680^2 + 2937^2 .

It is not a de Polignac number, because 30528369 - 2⁴ = 30528353 is a prime.

It is a super-2 number, since 2×30528369² = 1863962627600322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30528469) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1696012 + ... + 1696029.

Almost surely, 2^30528369 is an apocalyptic number.

It is an amenable number.

30528369 is a deficient number, since it is larger than the sum of its proper divisors (13568177).

30528369 is a wasteful number, since it uses less digits than its factorization.

30528369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3392047 (or 3392044 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 30528369 is about 5525.2483202115. The cubic root of 30528369 is about 312.5368285129.

The spelling of 30528369 in words is "thirty million, five hundred twenty-eight thousand, three hundred sixty-nine".