30547928 has 16 divisors (see below), whose sum is σ = 58358880. Its totient is φ = 14985568.

The previous prime is 30547921. The next prime is 30547939. The reversal of 30547928 is 82974503.

It is a junction number, because it is equal to n+sod(n) for n = 30547891 and 30547900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30547921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35600 + ... + 36447.

It is an arithmetic number, because the mean of its divisors is an integer number (3647430).

Almost surely, 2^30547928 is an apocalyptic number.

It is an amenable number.

30547928 is a deficient number, since it is larger than the sum of its proper divisors (27810952).

30547928 is a wasteful number, since it uses less digits than its factorization.

30547928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72106 (or 72102 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 30547928 is about 5527.0180025037. The cubic root of 30547928 is about 312.6035599173.

The spelling of 30547928 in words is "thirty million, five hundred forty-seven thousand, nine hundred twenty-eight".