30140812 has 18 divisors (see below), whose sum is σ = 57117228. Its totient is φ = 13910832.

The previous prime is 30140809. The next prime is 30140827. The reversal of 30140812 is 21804103.

It is a self number, because there is not a number n which added to its sum of digits gives 30140812.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21618 + ... + 22969.

Almost surely, 2^30140812 is an apocalyptic number.

It is an amenable number.

30140812 is a deficient number, since it is larger than the sum of its proper divisors (26976416).

30140812 is a wasteful number, since it uses less digits than its factorization.

30140812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44617 (or 44602 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 30140812 is about 5490.0648447901. The cubic root of 30140812 is about 311.2086426450.

Adding to 30140812 its reverse (21804103), we get a palindrome (51944915).

The spelling of 30140812 in words is "thirty million, one hundred forty thousand, eight hundred twelve".