30123312 has 40 divisors (see below), whose sum is σ = 78923520. Its totient is φ = 9898560.

The previous prime is 30123281. The next prime is 30123329. The reversal of 30123312 is 21332103.

It is a junction number, because it is equal to n+sod(n) for n = 30123291 and 30123300.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1012 + ... + 7827.

It is an arithmetic number, because the mean of its divisors is an integer number (1973088).

Almost surely, 2^30123312 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 30123312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39461760).

30123312 is an abundant number, since it is smaller than the sum of its proper divisors (48800208).

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

30123312 is a wasteful number, since it uses less digits than its factorization.

30123312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8921 (or 8915 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 30123312 is about 5488.4708252846. The cubic root of 30123312 is about 311.1484008969.

Adding to 30123312 its reverse (21332103), we get a palindrome (51455415).

The spelling of 30123312 in words is "thirty million, one hundred twenty-three thousand, three hundred twelve".