30805569 has 16 divisors (see below), whose sum is σ = 47212800. Its totient is φ = 19828368.

The previous prime is 30805553. The next prime is 30805573. The reversal of 30805569 is 96550803.

It is not a de Polignac number, because 30805569 - 2⁴ = 30805553 is a prime.

It is a super-2 number, since 2×30805569² = 1897966162827522, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30805519) 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 15 ways as a sum of consecutive naturals, for example, 18889 + ... + 20454.

It is an arithmetic number, because the mean of its divisors is an integer number (2950800).

Almost surely, 2^30805569 is an apocalyptic number.

It is an amenable number.

30805569 is a deficient number, since it is larger than the sum of its proper divisors (16407231).

30805569 is a wasteful number, since it uses less digits than its factorization.

30805569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39381 (or 39375 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 30805569 is about 5550.2764795999. The cubic root of 30805569 is about 313.4799327830.

It can be divided in two parts, 3080 and 5569, that added together give a square (8649 = 93²).

The spelling of 30805569 in words is "thirty million, eight hundred five thousand, five hundred sixty-nine".