29720417 has 8 divisors (see below), whose sum is σ = 30234624. Its totient is φ = 29209248.

The previous prime is 29720401. The next prime is 29720419. The reversal of 29720417 is 71402792.

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

It is a cyclic number.

It is not a de Polignac number, because 29720417 - 2⁴ = 29720401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29720419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27428 + ... + 28490.

It is an arithmetic number, because the mean of its divisors is an integer number (3779328).

Almost surely, 2^29720417 is an apocalyptic number.

It is an amenable number.

29720417 is a deficient number, since it is larger than the sum of its proper divisors (514207).

29720417 is a wasteful number, since it uses less digits than its factorization.

29720417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 29720417 is about 5451.6435136571. The cubic root of 29720417 is about 309.7549815576.

The spelling of 29720417 in words is "twenty-nine million, seven hundred twenty thousand, four hundred seventeen".