30729211 has 8 divisors (see below), whose sum is σ = 31477824. Its totient is φ = 29984640.

The previous prime is 30729199. The next prime is 30729221. The reversal of 30729211 is 11292703.

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 30729211 - 2⁹ = 30728699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30729221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19011 + ... + 20563.

It is an arithmetic number, because the mean of its divisors is an integer number (3934728).

Almost surely, 2^30729211 is an apocalyptic number.

30729211 is a deficient number, since it is larger than the sum of its proper divisors (748613).

30729211 is a wasteful number, since it uses less digits than its factorization.

30729211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2021.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 30729211 is about 5543.3934552763. The cubic root of 30729211 is about 313.2207101150.

The spelling of 30729211 in words is "thirty million, seven hundred twenty-nine thousand, two hundred eleven".