28916 has 6 divisors (see below), whose sum is σ = 50610. Its totient is φ = 14456.

The previous prime is 28909. The next prime is 28921. The reversal of 28916 is 61982.

It can be written as a sum of positive squares in only one way, i.e., 28900 + 16 = 170^2 + 4^2 .

It is a super-2 number, since 2×28916² = 1672270112, which contains 22 as substring.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3611 + ... + 3618.

It is an arithmetic number, because the mean of its divisors is an integer number (8435).

2²⁸⁹¹⁶ is an apocalyptic number.

It is an amenable number.

28916 is a deficient number, since it is larger than the sum of its proper divisors (21694).

28916 is a wasteful number, since it uses less digits than its factorization.

28916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7233 (or 7231 counting only the distinct ones).

The product of its digits is 864, while the sum is 26.

The square root of 28916 is about 170.0470523120. The cubic root of 28916 is about 30.6934758212.

It can be divided in two parts, 289 and 16, that multiplied together give a square (4624 = 68²).

The spelling of 28916 in words is "twenty-eight thousand, nine hundred sixteen".