30809212 has 24 divisors (see below), whose sum is σ = 62466656. Its totient is φ = 13022208.

The previous prime is 30809183. The next prime is 30809221. The reversal of 30809212 is 21290803.

It is a congruent number.

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, 5493 + ... + 9580.

Almost surely, 2^30809212 is an apocalyptic number.

It is an amenable number.

30809212 is an abundant number, since it is smaller than the sum of its proper divisors (31657444).

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

30809212 is a wasteful number, since it uses less digits than its factorization.

30809212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15157 (or 15155 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 30809212 is about 5550.6046517474. The cubic root of 30809212 is about 313.4922894490.

The spelling of 30809212 in words is "thirty million, eight hundred nine thousand, two hundred twelve".