29938821 has 8 divisors (see below), whose sum is σ = 43547424. Its totient is φ = 18144720.

The previous prime is 29938789. The next prime is 29938873. The reversal of 29938821 is 12883992.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 29938821 - 2⁵ = 29938789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29938891) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 453586 + ... + 453651.

It is an arithmetic number, because the mean of its divisors is an integer number (5443428).

Almost surely, 2^29938821 is an apocalyptic number.

It is an amenable number.

29938821 is a deficient number, since it is larger than the sum of its proper divisors (13608603).

29938821 is a wasteful number, since it uses less digits than its factorization.

29938821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907251.

The product of its digits is 62208, while the sum is 42.

The square root of 29938821 is about 5471.6378717894. The cubic root of 29938821 is about 310.5118875443.

The spelling of 29938821 in words is "twenty-nine million, nine hundred thirty-eight thousand, eight hundred twenty-one".