28521086 has 8 divisors (see below), whose sum is σ = 46670904. Its totient is φ = 12964120.

The previous prime is 28521079. The next prime is 28521107. The reversal of 28521086 is 68012582.

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

It is a Curzon number.

It is a congruent number.

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, 648185 + ... + 648228.

It is an arithmetic number, because the mean of its divisors is an integer number (5833863).

Almost surely, 2^28521086 is an apocalyptic number.

28521086 is a deficient number, since it is larger than the sum of its proper divisors (18149818).

28521086 is a wasteful number, since it uses less digits than its factorization.

28521086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296426.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 28521086 is about 5340.5136457086. The cubic root of 28521086 is about 305.5310501021.

The spelling of 28521086 in words is "twenty-eight million, five hundred twenty-one thousand, eighty-six".