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256884 = 22321407
BaseRepresentation
bin111110101101110100
3111001101020
4332231310
531210014
65301140
72116635
oct765564
9431336
10256884
11166001
121047b0
138cc04
146988c
15511a9
hex3eb74

256884 has 12 divisors (see below), whose sum is σ = 599424. Its totient is φ = 85624.

The previous prime is 256877. The next prime is 256889. The reversal of 256884 is 488652.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10692 + ... + 10715.

It is an arithmetic number, because the mean of its divisors is an integer number (49952).

2256884 is an apocalyptic number.

It is an amenable number.

256884 is an abundant number, since it is smaller than the sum of its proper divisors (342540).

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

256884 is a wasteful number, since it uses less digits than its factorization.

256884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21414 (or 21412 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 256884 is about 506.8372519853. The cubic root of 256884 is about 63.5690447041.

The spelling of 256884 in words is "two hundred fifty-six thousand, eight hundred eighty-four".

Divisors: 1 2 3 4 6 12 21407 42814 64221 85628 128442 256884