29156881 has 12 divisors (see below), whose sum is σ = 32173428. Its totient is φ = 26266464.

The previous prime is 29156879. The next prime is 29156899. The reversal of 29156881 is 18865192.

It can be written as a sum of positive squares in 2 ways, for example, as 2531281 + 26625600 = 1591^2 + 5160^2 .

It is not a de Polignac number, because 29156881 - 2¹ = 29156879 is a prime.

It is a super-2 number, since 2×29156881² = 1700247419296322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29156381) 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 11 ways as a sum of consecutive naturals, for example, 23431 + ... + 24643.

It is an arithmetic number, because the mean of its divisors is an integer number (2681119).

Almost surely, 2^29156881 is an apocalyptic number.

It is an amenable number.

29156881 is a deficient number, since it is larger than the sum of its proper divisors (3016547).

29156881 is a wasteful number, since it uses less digits than its factorization.

29156881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312 (or 1269 counting only the distinct ones).

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

The square root of 29156881 is about 5399.7111959808. The cubic root of 29156881 is about 307.7846959056.

The spelling of 29156881 in words is "twenty-nine million, one hundred fifty-six thousand, eight hundred eighty-one".