30823681 has 16 divisors (see below), whose sum is σ = 37877760. Its totient is φ = 24492240.

The previous prime is 30823679. The next prime is 30823699. The reversal of 30823681 is 18632803.

It is a cyclic number.

It is not a de Polignac number, because 30823681 - 2¹ = 30823679 is a prime.

It is a super-2 number, since 2×30823681² = 1900198620779522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30823631) 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, 3786 + ... + 8716.

It is an arithmetic number, because the mean of its divisors is an integer number (2367360).

Almost surely, 2^30823681 is an apocalyptic number.

It is an amenable number.

30823681 is a deficient number, since it is larger than the sum of its proper divisors (7054079).

30823681 is a wasteful number, since it uses less digits than its factorization.

30823681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5004.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 30823681 is about 5551.9078702731. The cubic root of 30823681 is about 313.5413571331.

The spelling of 30823681 in words is "thirty million, eight hundred twenty-three thousand, six hundred eighty-one".