30303872 has 16 divisors (see below), whose sum is σ = 60371250. Its totient is φ = 15151872.

The previous prime is 30303829. The next prime is 30303893. The reversal of 30303872 is 27830303.

It can be written as a sum of positive squares in only one way, i.e., 27290176 + 3013696 = 5224^2 + 1736^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an alternating number because its digits alternate between odd and even.

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 as a sum of consecutive naturals, namely, 118247 + ... + 118502.

Almost surely, 2^30303872 is an apocalyptic number.

30303872 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

30303872 is a deficient number, since it is larger than the sum of its proper divisors (30067378).

30303872 is an equidigital number, since it uses as much as digits as its factorization.

30303872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236763 (or 236751 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 30303872 is about 5504.8952760248. The cubic root of 30303872 is about 311.7688403922.

The spelling of 30303872 in words is "thirty million, three hundred three thousand, eight hundred seventy-two".