29899221 has 24 divisors (see below), whose sum is σ = 45249792. Its totient is φ = 17529600.

The previous prime is 29899193. The next prime is 29899231. The reversal of 29899221 is 12299892.

It is a happy number.

It is not a de Polignac number, because 29899221 - 2⁵ = 29899189 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29899231) 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 23 ways as a sum of consecutive naturals, for example, 9925 + ... + 12581.

It is an arithmetic number, because the mean of its divisors is an integer number (1885408).

Almost surely, 2^29899221 is an apocalyptic number.

It is an amenable number.

29899221 is a deficient number, since it is larger than the sum of its proper divisors (15350571).

29899221 is a wasteful number, since it uses less digits than its factorization.

29899221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2713 (or 2702 counting only the distinct ones).

The product of its digits is 46656, while the sum is 42.

The square root of 29899221 is about 5468.0180138694. The cubic root of 29899221 is about 310.3749227192.

The spelling of 29899221 in words is "twenty-nine million, eight hundred ninety-nine thousand, two hundred twenty-one".