30320312 has 48 divisors (see below), whose sum is σ = 64751400. Its totient is φ = 13184640.

The previous prime is 30320291. The next prime is 30320317. The reversal of 30320312 is 21302303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30320317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 278114 + ... + 278222.

Almost surely, 2^30320312 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 30320312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32375700).

30320312 is an abundant number, since it is smaller than the sum of its proper divisors (34431088).

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

30320312 is a wasteful number, since it uses less digits than its factorization.

30320312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 30320312 is about 5506.3882899774. The cubic root of 30320312 is about 311.8252089111.

Adding to 30320312 its reverse (21302303), we get a palindrome (51622615).

Subtracting from 30320312 its reverse (21302303), we obtain a square (9018009 = 3003²).

The spelling of 30320312 in words is "thirty million, three hundred twenty thousand, three hundred twelve".