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80580 = 22351779
BaseRepresentation
bin10011101011000100
311002112110
4103223010
510034310
61421020
7453633
oct235304
9132473
1080580
11555a5
123a770
132a8a6
142151a
1518d20
hex13ac4

80580 has 48 divisors (see below), whose sum is σ = 241920. Its totient is φ = 19968.

The previous prime is 80567. The next prime is 80599. The reversal of 80580 is 8508.

It is a super-3 number, since 3×805803 = 1569650793336000, which contains 333 as substring.

It is an unprimeable number.

80580 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 981 + ... + 1059.

It is an arithmetic number, because the mean of its divisors is an integer number (5040).

280580 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120960).

80580 is an abundant number, since it is smaller than the sum of its proper divisors (161340).

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

80580 is a wasteful number, since it uses less digits than its factorization.

80580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 80580 is about 283.8661656485. The cubic root of 80580 is about 43.1925741694.

Adding to 80580 its sum of digits (21), we get a triangular number (80601 = T401).

The spelling of 80580 in words is "eighty thousand, five hundred eighty".

Divisors: 1 2 3 4 5 6 10 12 15 17 20 30 34 51 60 68 79 85 102 158 170 204 237 255 316 340 395 474 510 790 948 1020 1185 1343 1580 2370 2686 4029 4740 5372 6715 8058 13430 16116 20145 26860 40290 80580