29128143 has 16 divisors (see below), whose sum is σ = 44211456. Its totient is φ = 16885440.

The previous prime is 29128129. The next prime is 29128147. The reversal of 29128143 is 34182192.

It is not a de Polignac number, because 29128143 - 2⁶ = 29128079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 29128143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29128147) 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 15 ways as a sum of consecutive naturals, for example, 18430 + ... + 19947.

It is an arithmetic number, because the mean of its divisors is an integer number (2763216).

Almost surely, 2^29128143 is an apocalyptic number.

29128143 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

29128143 is a deficient number, since it is larger than the sum of its proper divisors (15083313).

29128143 is a wasteful number, since it uses less digits than its factorization.

29128143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38414.

The product of its digits is 3456, while the sum is 30.

The square root of 29128143 is about 5397.0494717021. The cubic root of 29128143 is about 307.6835416910.

The spelling of 29128143 in words is "twenty-nine million, one hundred twenty-eight thousand, one hundred forty-three".