28528216 has 8 divisors (see below), whose sum is σ = 53490420. Its totient is φ = 14264104.

The previous prime is 28528189. The next prime is 28528231. The reversal of 28528216 is 61282582.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1783006 + ... + 1783021.

Almost surely, 2^28528216 is an apocalyptic number.

It is an amenable number.

28528216 is a deficient number, since it is larger than the sum of its proper divisors (24962204).

28528216 is a wasteful number, since it uses less digits than its factorization.

28528216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3566033 (or 3566029 counting only the distinct ones).

The product of its digits is 15360, while the sum is 34.

The square root of 28528216 is about 5341.1811427811. The cubic root of 28528216 is about 305.5565079321.

The spelling of 28528216 in words is "twenty-eight million, five hundred twenty-eight thousand, two hundred sixteen".