29989217885 has 16 divisors (see below), whose sum is σ = 39493706112. Its totient is φ = 21679732800.

The previous prime is 29989217833. The next prime is 29989217987. The reversal of 29989217885 is 58871298992.

It is a de Polignac number, because none of the positive numbers 2^k-29989217885 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1623326 + ... + 1641695.

It is an arithmetic number, because the mean of its divisors is an integer number (2468356632).

Almost surely, 2^29989217885 is an apocalyptic number.

It is an amenable number.

29989217885 is a deficient number, since it is larger than the sum of its proper divisors (9504488227).

29989217885 is a wasteful number, since it uses less digits than its factorization.

29989217885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3265204.

The product of its digits is 52254720, while the sum is 68.

The spelling of 29989217885 in words is "twenty-nine billion, nine hundred eighty-nine million, two hundred seventeen thousand, eight hundred eighty-five".