28917086 has 16 divisors (see below), whose sum is σ = 47433600. Its totient is φ = 13112280.

The previous prime is 28917073. The next prime is 28917101. The reversal of 28917086 is 68071982.

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, 9365 + ... + 12063.

It is an arithmetic number, because the mean of its divisors is an integer number (2964600).

Almost surely, 2^28917086 is an apocalyptic number.

28917086 is a deficient number, since it is larger than the sum of its proper divisors (18516514).

28917086 is a wasteful number, since it uses less digits than its factorization.

28917086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3199.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 28917086 is about 5377.4609250091. The cubic root of 28917086 is about 306.9386006860.

The spelling of 28917086 in words is "twenty-eight million, nine hundred seventeen thousand, eighty-six".