30040212 has 12 divisors (see below), whose sum is σ = 70093856. Its totient is φ = 10013400.

The previous prime is 30040211. The next prime is 30040217. The reversal of 30040212 is 21204003.

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

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 2503351 = 30040212 / (3 + 0 + 0 + 4 + 0 + 2 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30040211) 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, 1251664 + ... + 1251687.

Almost surely, 2^30040212 is an apocalyptic number.

It is an amenable number.

30040212 is an abundant number, since it is smaller than the sum of its proper divisors (40053644).

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

30040212 is a wasteful number, since it uses less digits than its factorization.

30040212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2503358 (or 2503356 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 30040212 is about 5480.8951823584. The cubic root of 30040212 is about 310.8620197601.

Adding to 30040212 its reverse (21204003), we get a palindrome (51244215).

The spelling of 30040212 in words is "thirty million, forty thousand, two hundred twelve".