30812811 has 8 divisors (see below), whose sum is σ = 42039360. Its totient is φ = 20064072.

The previous prime is 30812783. The next prime is 30812827. The reversal of 30812811 is 11821803.

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

It is not a de Polignac number, because 30812811 - 2¹³ = 30804619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30812711) 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, 119301 + ... + 119558.

It is an arithmetic number, because the mean of its divisors is an integer number (5254920).

Almost surely, 2^30812811 is an apocalyptic number.

30812811 is a deficient number, since it is larger than the sum of its proper divisors (11226549).

30812811 is a wasteful number, since it uses less digits than its factorization.

30812811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238905.

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 30812811 is about 5550.9288411941. The cubic root of 30812811 is about 313.5044959152.

The spelling of 30812811 in words is "thirty million, eight hundred twelve thousand, eight hundred eleven".