30828561 has 8 divisors (see below), whose sum is σ = 41191104. Its totient is φ = 20509200.

The previous prime is 30828541. The next prime is 30828593. The reversal of 30828561 is 16582803.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30828561 - 2⁵ = 30828529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30828541) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9090 + ... + 12011.

It is an arithmetic number, because the mean of its divisors is an integer number (5148888).

Almost surely, 2^30828561 is an apocalyptic number.

It is an amenable number.

30828561 is a deficient number, since it is larger than the sum of its proper divisors (10362543).

30828561 is a wasteful number, since it uses less digits than its factorization.

30828561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21591.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 30828561 is about 5552.3473414404. The cubic root of 30828561 is about 313.5579028650.

The spelling of 30828561 in words is "thirty million, eight hundred twenty-eight thousand, five hundred sixty-one".