30000312 has 48 divisors (see below), whose sum is σ = 83878080. Its totient is φ = 9676800.

The previous prime is 30000307. The next prime is 30000317. The reversal of 30000312 is 21300003.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30000307) and next prime (30000317).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 30000294 and 30000303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30000317) 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, 4489 + ... + 8952.

It is an arithmetic number, because the mean of its divisors is an integer number (1747460).

Almost surely, 2^30000312 is an apocalyptic number.

It is an amenable number.

30000312 is an abundant number, since it is smaller than the sum of its proper divisors (53877768).

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

30000312 is a wasteful number, since it uses less digits than its factorization.

30000312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13484 (or 13477 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 9.

The square root of 30000312 is about 5477.2540565506. The cubic root of 30000312 is about 310.7243277656.

Adding to 30000312 its reverse (21300003), we get a palindrome (51300315).

The spelling of 30000312 in words is "thirty million, three hundred twelve", and thus it is an aban number.