30768928 has 12 divisors (see below), whose sum is σ = 60576390. Its totient is φ = 15384448.

The previous prime is 30768911. The next prime is 30768931. The reversal of 30768928 is 82986703.

It can be written as a sum of positive squares in only one way, i.e., 22543504 + 8225424 = 4748^2 + 2868^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480733 + ... + 480796.

Almost surely, 2^30768928 is an apocalyptic number.

It is an amenable number.

30768928 is a deficient number, since it is larger than the sum of its proper divisors (29807462).

30768928 is an equidigital number, since it uses as much as digits as its factorization.

30768928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961539 (or 961531 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 30768928 is about 5546.9746709355. The cubic root of 30768928 is about 313.3555962251.

The spelling of 30768928 in words is "thirty million, seven hundred sixty-eight thousand, nine hundred twenty-eight".