29985909 has 8 divisors (see below), whose sum is σ = 42333120. Its totient is φ = 18814656.

The previous prime is 29985899. The next prime is 29985911. The reversal of 29985909 is 90958992.

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

It is not a de Polignac number, because 29985909 - 2⁵ = 29985877 is a prime.

It is a super-3 number, since 3×29985909³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 587959 = 29985909 / (2 + 9 + 9 + 8 + 5 + 9 + 0 + 9).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29985919) 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 7 ways as a sum of consecutive naturals, for example, 293929 + ... + 294030.

It is an arithmetic number, because the mean of its divisors is an integer number (5291640).

Almost surely, 2^29985909 is an apocalyptic number.

It is an amenable number.

29985909 is a deficient number, since it is larger than the sum of its proper divisors (12347211).

29985909 is a wasteful number, since it uses less digits than its factorization.

29985909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587979.

The product of its (nonzero) digits is 524880, while the sum is 51.

The square root of 29985909 is about 5475.9390975430. The cubic root of 29985909 is about 310.6745940730.

The spelling of 29985909 in words is "twenty-nine million, nine hundred eighty-five thousand, nine hundred nine".