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28078 = 2101139
BaseRepresentation
bin110110110101110
31102111221
412312232
51344303
6333554
7144601
oct66656
942457
1028078
111a106
12142ba
13ca1b
14a338
1584bd
hex6dae

28078 has 8 divisors (see below), whose sum is σ = 42840. Its totient is φ = 13800.

The previous prime is 28069. The next prime is 28081. The reversal of 28078 is 87082.

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

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, 133 + ... + 271.

It is an arithmetic number, because the mean of its divisors is an integer number (5355).

228078 is an apocalyptic number.

28078 is a deficient number, since it is larger than the sum of its proper divisors (14762).

28078 is a wasteful number, since it uses less digits than its factorization.

28078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 28078 is about 167.5649127950. The cubic root of 28078 is about 30.3940604740.

The spelling of 28078 in words is "twenty-eight thousand, seventy-eight".

Divisors: 1 2 101 139 202 278 14039 28078