30726328 has 8 divisors (see below), whose sum is σ = 57611880. Its totient is φ = 15363160.

The previous prime is 30726281. The next prime is 30726329. The reversal of 30726328 is 82362703.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 30726328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30726329) 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 as a sum of consecutive naturals, namely, 1920388 + ... + 1920403.

It is an arithmetic number, because the mean of its divisors is an integer number (7201485).

Almost surely, 2^30726328 is an apocalyptic number.

It is an amenable number.

30726328 is a deficient number, since it is larger than the sum of its proper divisors (26885552).

30726328 is a wasteful number, since it uses less digits than its factorization.

30726328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3840797 (or 3840793 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 30726328 is about 5543.1334099045. The cubic root of 30726328 is about 313.2109144026.

The spelling of 30726328 in words is "thirty million, seven hundred twenty-six thousand, three hundred twenty-eight".