28772086 has 16 divisors (see below), whose sum is σ = 49787136. Its totient is φ = 12215016.

The previous prime is 28772077. The next prime is 28772141. The reversal of 28772086 is 68027782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8106 + ... + 11101.

It is an arithmetic number, because the mean of its divisors is an integer number (3111696).

Almost surely, 2^28772086 is an apocalyptic number.

28772086 is a deficient number, since it is larger than the sum of its proper divisors (21015050).

28772086 is a wasteful number, since it uses less digits than its factorization.

28772086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19323.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 28772086 is about 5363.9617821159. The cubic root of 28772086 is about 306.4247096421.

The spelling of 28772086 in words is "twenty-eight million, seven hundred seventy-two thousand, eighty-six".