30835809 has 15 divisors (see below), whose sum is σ = 46138147. Its totient is φ = 20523888.

The previous prime is 30835789. The next prime is 30835811. The reversal of 30835809 is 90853803.

The square root of 30835809 is 5553.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 893025 + 29942784 = 945^2 + 5472^2 .

It is not a de Polignac number, because 30835809 - 2⁷ = 30835681 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30831809) 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 14 ways as a sum of consecutive naturals, for example, 49669 + ... + 50285.

Almost surely, 2^30835809 is an apocalyptic number.

30835809 is the 5553-rd square number.

30835809 is the 2777-th centered octagonal number.

It is an amenable number.

30835809 is a deficient number, since it is larger than the sum of its proper divisors (15302338).

30835809 is an frugal number, since it uses more digits than its factorization.

30835809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The cubic root of 30835809 is about 313.5824741232.

Multiplying 30835809 by its sum of digits (36), we get a square (1110089124 = 33318²).

The spelling of 30835809 in words is "thirty million, eight hundred thirty-five thousand, eight hundred nine".