29805128 has 16 divisors (see below), whose sum is σ = 57395580. Its totient is φ = 14499648.

The previous prime is 29805119. The next prime is 29805157. The reversal of 29805128 is 82150892.

It can be written as a sum of positive squares in 2 ways, for example, as 29398084 + 407044 = 5422^2 + 638^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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, 50051 + ... + 50642.

Almost surely, 2^29805128 is an apocalyptic number.

It is an amenable number.

29805128 is a deficient number, since it is larger than the sum of its proper divisors (27590452).

29805128 is a wasteful number, since it uses less digits than its factorization.

29805128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100736 (or 100732 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 29805128 is about 5459.4072938369. The cubic root of 29805128 is about 310.0489967646.

The spelling of 29805128 in words is "twenty-nine million, eight hundred five thousand, one hundred twenty-eight".