30903028 has 24 divisors (see below), whose sum is σ = 59344488. Its totient is φ = 13992576.

The previous prime is 30902981. The next prime is 30903043. The reversal of 30903028 is 82030903.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11664 + 30891364 = 108^2 + 5558^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30902993 and 30903011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2851 + ... + 8362.

It is an arithmetic number, because the mean of its divisors is an integer number (2472687).

Almost surely, 2^30903028 is an apocalyptic number.

It is an amenable number.

30903028 is a deficient number, since it is larger than the sum of its proper divisors (28441460).

30903028 is a wasteful number, since it uses less digits than its factorization.

30903028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11283 (or 11281 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 30903028 is about 5559.0491992786. The cubic root of 30903028 is about 313.8101682991.

The spelling of 30903028 in words is "thirty million, nine hundred three thousand, twenty-eight".