29972811 has 16 divisors (see below), whose sum is σ = 43688448. Its totient is φ = 18127200.

The previous prime is 29972809. The next prime is 29972827. The reversal of 29972811 is 11827992.

It is not a de Polignac number, because 29972811 - 2¹ = 29972809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 29972811.

It is not an unprimeable number, because it can be changed into a prime (29972801) 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 15 ways as a sum of consecutive naturals, for example, 29565 + ... + 30561.

It is an arithmetic number, because the mean of its divisors is an integer number (2730528).

Almost surely, 2^29972811 is an apocalyptic number.

29972811 is a deficient number, since it is larger than the sum of its proper divisors (13715637).

29972811 is a wasteful number, since it uses less digits than its factorization.

29972811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922.

The product of its digits is 18144, while the sum is 39.

The square root of 29972811 is about 5474.7430076671. The cubic root of 29972811 is about 310.6293527291.

The spelling of 29972811 in words is "twenty-nine million, nine hundred seventy-two thousand, eight hundred eleven".