30798872 has 64 divisors (see below), whose sum is σ = 66044160. Its totient is φ = 13363200.

The previous prime is 30798871. The next prime is 30798907. The reversal of 30798872 is 27889703.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30798871) 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 15 ways as a sum of consecutive naturals, for example, 132068 + ... + 132300.

It is an arithmetic number, because the mean of its divisors is an integer number (1031940).

Almost surely, 2^30798872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30798872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33022080).

30798872 is an abundant number, since it is smaller than the sum of its proper divisors (35245288).

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

30798872 is a wasteful number, since it uses less digits than its factorization.

30798872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 30798872 is about 5549.6731435284. The cubic root of 30798872 is about 313.4572147342.

The spelling of 30798872 in words is "thirty million, seven hundred ninety-eight thousand, eight hundred seventy-two".