28712086 has 12 divisors (see below), whose sum is σ = 46636452. Its totient is φ = 13251576.

The previous prime is 28712083. The next prime is 28712087. The reversal of 28712086 is 68021782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28712083) by changing a digit.

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 in 5 ways as a sum of consecutive naturals, for example, 42136 + ... + 42811.

It is an arithmetic number, because the mean of its divisors is an integer number (3886371).

Almost surely, 2^28712086 is an apocalyptic number.

28712086 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28712086 is a deficient number, since it is larger than the sum of its proper divisors (17924366).

28712086 is a wasteful number, since it uses less digits than its factorization.

28712086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84975 (or 84962 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 28712086 is about 5358.3659822748. The cubic root of 28712086 is about 306.2115600233.

The spelling of 28712086 in words is "twenty-eight million, seven hundred twelve thousand, eighty-six".