29728905 has 16 divisors (see below), whose sum is σ = 48277824. Its totient is φ = 15618240.

The previous prime is 29728891. The next prime is 29728913. The reversal of 29728905 is 50982792.

It is not a de Polignac number, because 29728905 - 2⁵ = 29728873 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13786 + ... + 15795.

It is an arithmetic number, because the mean of its divisors is an integer number (3017364).

Almost surely, 2^29728905 is an apocalyptic number.

It is an amenable number.

29728905 is a deficient number, since it is larger than the sum of its proper divisors (18548919).

29728905 is a wasteful number, since it uses less digits than its factorization.

29728905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29656.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 29728905 is about 5452.4219389185. The cubic root of 29728905 is about 309.7844669001.

The spelling of 29728905 in words is "twenty-nine million, seven hundred twenty-eight thousand, nine hundred five".