30775812 has 12 divisors (see below), whose sum is σ = 71810256. Its totient is φ = 10258600.

The previous prime is 30775753. The next prime is 30775879. The reversal of 30775812 is 21857703.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1282314 + ... + 1282337.

It is an arithmetic number, because the mean of its divisors is an integer number (5984188).

Almost surely, 2^30775812 is an apocalyptic number.

It is an amenable number.

30775812 is an abundant number, since it is smaller than the sum of its proper divisors (41034444).

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

30775812 is a wasteful number, since it uses less digits than its factorization.

30775812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564658 (or 2564656 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 30775812 is about 5547.5951546594. The cubic root of 30775812 is about 313.3789637283.

The spelling of 30775812 in words is "thirty million, seven hundred seventy-five thousand, eight hundred twelve".