30775872 has 56 divisors (see below), whose sum is σ = 82499200. Its totient is φ = 10123776.

The previous prime is 30775753. The next prime is 30775879. The reversal of 30775872 is 27857703.

It is a self number, because there is not a number n which added to its sum of digits gives 30775872.

It is not an unprimeable number, because it can be changed into a prime (30775879) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 14154 + ... + 16182.

It is an arithmetic number, because the mean of its divisors is an integer number (1473200).

Almost surely, 2^30775872 is an apocalyptic number.

30775872 is a gapful number since it is divisible by the number (32) 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 30775872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41249600).

30775872 is an abundant number, since it is smaller than the sum of its proper divisors (51723328).

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

30775872 is a wasteful number, since it uses less digits than its factorization.

30775872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123 (or 2113 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 39.

The square root of 30775872 is about 5547.6005624053. The cubic root of 30775872 is about 313.3791673809.

The spelling of 30775872 in words is "thirty million, seven hundred seventy-five thousand, eight hundred seventy-two".