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87230 = 25111361
BaseRepresentation
bin10101010010111110
311102122202
4111102332
510242410
61511502
7512213
oct252276
9142582
1087230
115a5a0
1242592
1330920
1423b0a
151aca5
hex154be

87230 has 32 divisors (see below), whose sum is σ = 187488. Its totient is φ = 28800.

The previous prime is 87223. The next prime is 87251. The reversal of 87230 is 3278.

87230 = T20 + T21 + ... + T80.

It is a Smith number, since the sum of its digits (20) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1400 + ... + 1460.

It is an arithmetic number, because the mean of its divisors is an integer number (5859).

287230 is an apocalyptic number.

87230 is an abundant number, since it is smaller than the sum of its proper divisors (100258).

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 (93744).

87230 is a wasteful number, since it uses less digits than its factorization.

87230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 87230 is about 295.3472532461. The cubic root of 87230 is about 44.3494894038.

The spelling of 87230 in words is "eighty-seven thousand, two hundred thirty".

Divisors: 1 2 5 10 11 13 22 26 55 61 65 110 122 130 143 286 305 610 671 715 793 1342 1430 1586 3355 3965 6710 7930 8723 17446 43615 87230