29905389 has 16 divisors (see below), whose sum is σ = 45057600. Its totient is φ = 19597968.

The previous prime is 29905357. The next prime is 29905417. The reversal of 29905389 is 98350992.

29905389 is a `hidden beast` number, since 29 + 90 + 538 + 9 = 666.

It is not a de Polignac number, because 29905389 - 2⁵ = 29905357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29903389) 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 15 ways as a sum of consecutive naturals, for example, 7794 + ... + 10979.

It is an arithmetic number, because the mean of its divisors is an integer number (2816100).

Almost surely, 2^29905389 is an apocalyptic number.

It is an amenable number.

29905389 is a deficient number, since it is larger than the sum of its proper divisors (15152211).

29905389 is a wasteful number, since it uses less digits than its factorization.

29905389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18841 (or 18835 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 29905389 is about 5468.5819917050. The cubic root of 29905389 is about 310.3962639764.

The spelling of 29905389 in words is "twenty-nine million, nine hundred five thousand, three hundred eighty-nine".