28016930 has 8 divisors (see below), whose sum is σ = 50430492. Its totient is φ = 11206768.

The previous prime is 28016897. The next prime is 28016957. The reversal of 28016930 is 3961082.

It can be written as a sum of positive squares in 2 ways, for example, as 26142769 + 1874161 = 5113^2 + 1369^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 28016893 and 28016902.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1400837 + ... + 1400856.

Almost surely, 2^28016930 is an apocalyptic number.

28016930 is a deficient number, since it is larger than the sum of its proper divisors (22413562).

28016930 is a wasteful number, since it uses less digits than its factorization.

28016930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2801700.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 28016930 is about 5293.1021150172. The cubic root of 28016930 is about 303.7200865844.

The spelling of 28016930 in words is "twenty-eight million, sixteen thousand, nine hundred thirty".