29161885 has 8 divisors (see below), whose sum is σ = 37052856. Its totient is φ = 21957120.

The previous prime is 29161877. The next prime is 29161889. The reversal of 29161885 is 58816192.

29161885 = 3818² + 3819².

It can be written as a sum of positive squares in 4 ways, for example, as 14577124 + 14584761 = 3818^2 + 3819^2 .

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

It is not a de Polignac number, because 29161885 - 2³ = 29161877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29161889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171456 + ... + 171625.

It is an arithmetic number, because the mean of its divisors is an integer number (4631607).

Almost surely, 2^29161885 is an apocalyptic number.

29161885 is the 3819-th centered square number.

It is an amenable number.

29161885 is a deficient number, since it is larger than the sum of its proper divisors (7890971).

29161885 is a wasteful number, since it uses less digits than its factorization.

29161885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343103.

The product of its digits is 34560, while the sum is 40.

The square root of 29161885 is about 5400.1745342165. The cubic root of 29161885 is about 307.8023025730.

The spelling of 29161885 in words is "twenty-nine million, one hundred sixty-one thousand, eight hundred eighty-five".