29855881 has 4 divisors (see below), whose sum is σ = 32570064. Its totient is φ = 27141700.

The previous prime is 29855879. The next prime is 29855887. The reversal of 29855881 is 18855892.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 29855881 - 2¹ = 29855879 is a prime.

It is a super-2 number, since 2×29855881² = 1782747260572322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29855887) 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 3 ways as a sum of consecutive naturals, for example, 1357075 + ... + 1357096.

It is an arithmetic number, because the mean of its divisors is an integer number (8142516).

Almost surely, 2^29855881 is an apocalyptic number.

It is an amenable number.

29855881 is a deficient number, since it is larger than the sum of its proper divisors (2714183).

29855881 is a wasteful number, since it uses less digits than its factorization.

29855881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2714182.

The product of its digits is 230400, while the sum is 46.

The square root of 29855881 is about 5464.0535319486. The cubic root of 29855881 is about 310.2248836492.

The spelling of 29855881 in words is "twenty-nine million, eight hundred fifty-five thousand, eight hundred eighty-one".