29128306 has 4 divisors (see below), whose sum is σ = 43692462. Its totient is φ = 14564152.

The previous prime is 29128303. The next prime is 29128321. The reversal of 29128306 is 60382192.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18139081 + 10989225 = 4259^2 + 3315^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (29128301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7282075 + ... + 7282078.

Almost surely, 2^29128306 is an apocalyptic number.

29128306 is a deficient number, since it is larger than the sum of its proper divisors (14564156).

29128306 is a wasteful number, since it uses less digits than its factorization.

29128306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14564155.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 29128306 is about 5397.0645725246. The cubic root of 29128306 is about 307.6841156184.

The spelling of 29128306 in words is "twenty-nine million, one hundred twenty-eight thousand, three hundred six".