30403812 has 12 divisors (see below), whose sum is σ = 70942256. Its totient is φ = 10134600.

The previous prime is 30403811. The next prime is 30403829. The reversal of 30403812 is 21830403.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (30403811) 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, 1266814 + ... + 1266837.

Almost surely, 2^30403812 is an apocalyptic number.

It is an amenable number.

30403812 is an abundant number, since it is smaller than the sum of its proper divisors (40538444).

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

30403812 is a wasteful number, since it uses less digits than its factorization.

30403812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2533658 (or 2533656 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 30403812 is about 5513.9651794330. The cubic root of 30403812 is about 312.1111947515. Note that the first 4 decimals are identical.

The spelling of 30403812 in words is "thirty million, four hundred three thousand, eight hundred twelve".