30757212 has 96 divisors (see below), whose sum is σ = 84268800. Its totient is φ = 9688896.

The previous prime is 30757211. The next prime is 30757217. The reversal of 30757212 is 21275703.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30757211) 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 31 ways as a sum of consecutive naturals, for example, 171739 + ... + 171917.

It is an arithmetic number, because the mean of its divisors is an integer number (877800).

Almost surely, 2^30757212 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 30757212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42134400).

30757212 is an abundant number, since it is smaller than the sum of its proper divisors (53511588).

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

30757212 is a wasteful number, since it uses less digits than its factorization.

30757212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 30757212 is about 5545.9184992208. The cubic root of 30757212 is about 313.3158186478.

The spelling of 30757212 in words is "thirty million, seven hundred fifty-seven thousand, two hundred twelve".