30208812 has 12 divisors (see below), whose sum is σ = 70487256. Its totient is φ = 10069600.

The previous prime is 30208811. The next prime is 30208819. The reversal of 30208812 is 21880203.

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 (30208811) 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, 1258689 + ... + 1258712.

It is an arithmetic number, because the mean of its divisors is an integer number (5873938).

Almost surely, 2^30208812 is an apocalyptic number.

It is an amenable number.

30208812 is an abundant number, since it is smaller than the sum of its proper divisors (40278444).

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

30208812 is a wasteful number, since it uses less digits than its factorization.

30208812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2517408 (or 2517406 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 30208812 is about 5496.2543609262. The cubic root of 30208812 is about 311.4425037755.

The spelling of 30208812 in words is "thirty million, two hundred eight thousand, eight hundred twelve".