30730836 has 48 divisors (see below), whose sum is σ = 74692800. Its totient is φ = 9821952.

The previous prime is 30730813. The next prime is 30730837. The reversal of 30730836 is 63803703.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30730837) 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, 80895 + ... + 81273.

It is an arithmetic number, because the mean of its divisors is an integer number (1556100).

Almost surely, 2^30730836 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 30730836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37346400).

30730836 is an abundant number, since it is smaller than the sum of its proper divisors (43961964).

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

30730836 is a wasteful number, since it uses less digits than its factorization.

30730836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 30730836 is about 5543.5400242084. The cubic root of 30730836 is about 313.2262311884.

The spelling of 30730836 in words is "thirty million, seven hundred thirty thousand, eight hundred thirty-six".