30528261 has 12 divisors (see below), whose sum is σ = 44156320. Its totient is φ = 20324520.

The previous prime is 30528247. The next prime is 30528287. The reversal of 30528261 is 16282503.

It is a de Polignac number, because none of the positive numbers 2^k-30528261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30528241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6426 + ... + 10116.

Almost surely, 2^30528261 is an apocalyptic number.

It is an amenable number.

30528261 is a deficient number, since it is larger than the sum of its proper divisors (13628059).

30528261 is a wasteful number, since it uses less digits than its factorization.

30528261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4616 (or 4613 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 30528261 is about 5525.2385468865. The cubic root of 30528261 is about 312.5364599593.

The spelling of 30528261 in words is "thirty million, five hundred twenty-eight thousand, two hundred sixty-one".