30729712 has 20 divisors (see below), whose sum is σ = 64119160. Its totient is φ = 14182848.

The previous prime is 30729701. The next prime is 30729719. The reversal of 30729712 is 21792703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30729719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73662 + ... + 74077.

It is an arithmetic number, because the mean of its divisors is an integer number (3205958).

Almost surely, 2^30729712 is an apocalyptic number.

It is an amenable number.

30729712 is an abundant number, since it is smaller than the sum of its proper divisors (33389448).

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

30729712 is a wasteful number, since it uses less digits than its factorization.

30729712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147760 (or 147754 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 30729712 is about 5543.4386440187. The cubic root of 30729712 is about 313.2224123252. Note that the first 3 decimals are identical.

The spelling of 30729712 in words is "thirty million, seven hundred twenty-nine thousand, seven hundred twelve".