30775500 has 144 divisors (see below), whose sum is σ = 111069504. Its totient is φ = 7027200.

The previous prime is 30775469. The next prime is 30775501. The reversal of 30775500 is 557703.

It is not an unprimeable number, because it can be changed into a prime (30775501) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 31012 + ... + 31988.

It is an arithmetic number, because the mean of its divisors is an integer number (771316).

Almost surely, 2^30775500 is an apocalyptic number.

30775500 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 30775500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55534752).

30775500 is an abundant number, since it is smaller than the sum of its proper divisors (80294004).

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

30775500 is a wasteful number, since it uses less digits than its factorization.

30775500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009 (or 994 counting only the distinct ones).

The product of its (nonzero) digits is 3675, while the sum is 27.

The square root of 30775500 is about 5547.5670342953. The cubic root of 30775500 is about 313.3779047303.

The spelling of 30775500 in words is "thirty million, seven hundred seventy-five thousand, five hundred".