30729216 has 88 divisors (see below), whose sum is σ = 93670720. Its totient is φ = 8773632.

The previous prime is 30729199. The next prime is 30729221. The reversal of 30729216 is 61292703.

It is an alternating number because its digits alternate between odd and even.

30729216 is a modest number, since divided by 9216 gives 3072 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20790 + ... + 22218.

It is an arithmetic number, because the mean of its divisors is an integer number (1064440).

Almost surely, 2^30729216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30729216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46835360).

30729216 is an abundant number, since it is smaller than the sum of its proper divisors (62941504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30729216 is a wasteful number, since it uses less digits than its factorization.

30729216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459 (or 1441 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 30729216 is about 5543.3939062636. The cubic root of 30729216 is about 313.2207271033.

The spelling of 30729216 in words is "thirty million, seven hundred twenty-nine thousand, two hundred sixteen".