30780212 has 12 divisors (see below), whose sum is σ = 54057696. Its totient is φ = 15335160.

The previous prime is 30780203. The next prime is 30780221. The reversal of 30780212 is 21208703.

It is an interprime number because it is at equal distance from previous prime (30780203) and next prime (30780221).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12464 + ... + 14727.

It is an arithmetic number, because the mean of its divisors is an integer number (4504808).

Almost surely, 2^30780212 is an apocalyptic number.

It is an amenable number.

30780212 is a deficient number, since it is larger than the sum of its proper divisors (23277484).

30780212 is a wasteful number, since it uses less digits than its factorization.

30780212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27478 (or 27476 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 30780212 is about 5547.9917087177. The cubic root of 30780212 is about 313.3938975529.

Adding to 30780212 its reverse (21208703), we get a palindrome (51988915).

The spelling of 30780212 in words is "thirty million, seven hundred eighty thousand, two hundred twelve".