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28002 = 2313359
BaseRepresentation
bin110110101100010
31102102010
412311202
51344002
6333350
7144432
oct66542
942363
1028002
111a047
1214256
13c990
14a2c2
15846c
hex6d62

28002 has 16 divisors (see below), whose sum is σ = 60480. Its totient is φ = 8592.

The previous prime is 28001. The next prime is 28019. The reversal of 28002 is 20082.

It is a super-2 number, since 2×280022 = 1568224008, which contains 22 as substring.

It is a nialpdrome in base 8 and base 13.

It is not an unprimeable number, because it can be changed into a prime (28001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102 + ... + 257.

It is an arithmetic number, because the mean of its divisors is an integer number (3780).

228002 is an apocalyptic number.

28002 is an abundant number, since it is smaller than the sum of its proper divisors (32478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30240).

28002 is a wasteful number, since it uses less digits than its factorization.

28002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 28002 is about 167.3379813431. The cubic root of 28002 is about 30.3666126989.

Adding to 28002 its reverse (20082), we get a palindrome (48084).

The spelling of 28002 in words is "twenty-eight thousand, two".

Divisors: 1 2 3 6 13 26 39 78 359 718 1077 2154 4667 9334 14001 28002