30808681 has 8 divisors (see below), whose sum is σ = 31152704. Its totient is φ = 30466800.

The previous prime is 30808669. The next prime is 30808691. The reversal of 30808681 is 18680803.

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

It is a cyclic number.

It is not a de Polignac number, because 30808681 - 2¹³ = 30800489 is a prime.

It is a super-2 number, since 2×30808681² = 1898349649919522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30808621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56050 + ... + 56596.

It is an arithmetic number, because the mean of its divisors is an integer number (3894088).

Almost surely, 2^30808681 is an apocalyptic number.

It is an amenable number.

30808681 is a deficient number, since it is larger than the sum of its proper divisors (344023).

30808681 is a wasteful number, since it uses less digits than its factorization.

30808681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 30808681 is about 5550.5568189147. The cubic root of 30808681 is about 313.4904884145.

The spelling of 30808681 in words is "thirty million, eight hundred eight thousand, six hundred eighty-one".