30920850 has 36 divisors (see below), whose sum is σ = 83075226. Its totient is φ = 8245440.

The previous prime is 30920843. The next prime is 30920861. The reversal of 30920850 is 5802903.

It can be written as a sum of positive squares in 3 ways, for example, as 21538881 + 9381969 = 4641^2 + 3063^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 33907 + ... + 34806.

Almost surely, 2^30920850 is an apocalyptic number.

30920850 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

30920850 is an abundant number, since it is smaller than the sum of its proper divisors (52154376).

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

30920850 is a wasteful number, since it uses less digits than its factorization.

30920850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68731 (or 68723 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 30920850 is about 5560.6519401955. The cubic root of 30920850 is about 313.8704822382.

The spelling of 30920850 in words is "thirty million, nine hundred twenty thousand, eight hundred fifty".