30181828 has 12 divisors (see below), whose sum is σ = 52875900. Its totient is φ = 15074432.

The previous prime is 30181799. The next prime is 30181831. The reversal of 30181828 is 82818103.

It can be written as a sum of positive squares in 2 ways, for example, as 14197824 + 15984004 = 3768^2 + 3998^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30181828.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 600 + ... + 7792.

It is an arithmetic number, because the mean of its divisors is an integer number (4406325).

Almost surely, 2^30181828 is an apocalyptic number.

It is an amenable number.

30181828 is a deficient number, since it is larger than the sum of its proper divisors (22694072).

30181828 is a wasteful number, since it uses less digits than its factorization.

30181828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8246 (or 8244 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 30181828 is about 5493.7990498379. The cubic root of 30181828 is about 311.3497442186.

The spelling of 30181828 in words is "thirty million, one hundred eighty-one thousand, eight hundred twenty-eight".