30715028 has 24 divisors (see below), whose sum is σ = 56282688. Its totient is φ = 14638976.

The previous prime is 30715021. The next prime is 30715067. The reversal of 30715028 is 82051703.

30715028 = T₃₂₇ + T₃₂₈ + ... + T₆₀₂.

It is a junction number, because it is equal to n+sod(n) for n = 30714988 and 30715006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30715021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51500 + ... + 52092.

It is an arithmetic number, because the mean of its divisors is an integer number (2345112).

Almost surely, 2^30715028 is an apocalyptic number.

It is an amenable number.

30715028 is a deficient number, since it is larger than the sum of its proper divisors (25567660).

30715028 is a wasteful number, since it uses less digits than its factorization.

30715028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183 (or 1181 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 30715028 is about 5542.1140370801. The cubic root of 30715028 is about 313.1725139219.

The spelling of 30715028 in words is "thirty million, seven hundred fifteen thousand, twenty-eight".