30947312 has 20 divisors (see below), whose sum is σ = 65411736. Its totient is φ = 14066880.

The previous prime is 30947311. The next prime is 30947317. The reversal of 30947312 is 21374903.

It is a super-2 number, since 2×30947312² = 1915472240050688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30947311) 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, 87743 + ... + 88094.

Almost surely, 2^30947312 is an apocalyptic number.

It is an amenable number.

30947312 is an abundant number, since it is smaller than the sum of its proper divisors (34464424).

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

30947312 is a wasteful number, since it uses less digits than its factorization.

30947312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175856 (or 175850 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 30947312 is about 5563.0308286041. The cubic root of 30947312 is about 313.9599932802.

The spelling of 30947312 in words is "thirty million, nine hundred forty-seven thousand, three hundred twelve".