29939885 has 4 divisors (see below), whose sum is σ = 35927868. Its totient is φ = 23951904.

The previous prime is 29939857. The next prime is 29939891. The reversal of 29939885 is 58893992.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20124196 + 9815689 = 4486^2 + 3133^2 .

It is a cyclic number.

It is not a de Polignac number, because 29939885 - 2²⁰ = 28891309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2993984 + ... + 2993993.

It is an arithmetic number, because the mean of its divisors is an integer number (8981967).

Almost surely, 2^29939885 is an apocalyptic number.

It is an amenable number.

29939885 is a deficient number, since it is larger than the sum of its proper divisors (5987983).

29939885 is an equidigital number, since it uses as much as digits as its factorization.

29939885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5987982.

The product of its digits is 1399680, while the sum is 53.

The square root of 29939885 is about 5471.7350995822. The cubic root of 29939885 is about 310.5155659427.

The spelling of 29939885 in words is "twenty-nine million, nine hundred thirty-nine thousand, eight hundred eighty-five".