30850920 has 144 divisors (see below), whose sum is σ = 107679780. Its totient is φ = 7633920.

The previous prime is 30850913. The next prime is 30850949. The reversal of 30850920 is 2905803.

It can be written as a sum of positive squares in 2 ways, for example, as 30669444 + 181476 = 5538^2 + 426^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 434485 + ... + 434555.

Almost surely, 2^30850920 is an apocalyptic number.

30850920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30850920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53839890).

30850920 is an abundant number, since it is smaller than the sum of its proper divisors (76828860).

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

30850920 is a wasteful number, since it uses less digits than its factorization.

30850920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176 (or 98 counting only the distinct ones).

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

The square root of 30850920 is about 5554.3604492327. The cubic root of 30850920 is about 313.6336891563.

The spelling of 30850920 in words is "thirty million, eight hundred fifty thousand, nine hundred twenty".