30875812 has 18 divisors (see below), whose sum is σ = 59392214. Its totient is φ = 14034240.

The previous prime is 30875773. The next prime is 30875833. The reversal of 30875812 is 21857803.

It can be written as a sum of positive squares in only one way, i.e., 30735936 + 139876 = 5544^2 + 374^2 .

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 5 ways as a sum of consecutive naturals, for example, 31413 + ... + 32380.

Almost surely, 2^30875812 is an apocalyptic number.

It is an amenable number.

30875812 is a deficient number, since it is larger than the sum of its proper divisors (28516402).

30875812 is a wasteful number, since it uses less digits than its factorization.

30875812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63819 (or 63806 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 30875812 is about 5556.6007594572. The cubic root of 30875812 is about 313.7180180413.

Subtracting from 30875812 its reverse (21857803), we obtain a square (9018009 = 3003²).

The spelling of 30875812 in words is "thirty million, eight hundred seventy-five thousand, eight hundred twelve".