29668221 has 32 divisors (see below), whose sum is σ = 48291840. Its totient is φ = 17852400.

The previous prime is 29668217. The next prime is 29668259. The reversal of 29668221 is 12286692.

It is a happy number.

It is not a de Polignac number, because 29668221 - 2² = 29668217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29668201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56466 + ... + 56988.

It is an arithmetic number, because the mean of its divisors is an integer number (1509120).

Almost surely, 2^29668221 is an apocalyptic number.

It is an amenable number.

29668221 is a deficient number, since it is larger than the sum of its proper divisors (18623619).

29668221 is a wasteful number, since it uses less digits than its factorization.

29668221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734 (or 728 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 29668221 is about 5446.8542297366. The cubic root of 29668221 is about 309.5735412459.

The spelling of 29668221 in words is "twenty-nine million, six hundred sixty-eight thousand, two hundred twenty-one".