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12580380 = 2233523297
BaseRepresentation
bin101111111111…
…011000011100
3212200011001000
4233333120130
511210033010
61125350300
7211634331
oct57773034
925604030
1012580380
11711290a
124268390
1327b6217
141956988
1511877c0
hexbff61c

12580380 has 48 divisors (see below), whose sum is σ = 39140640. Its totient is φ = 3354624.

The previous prime is 12580367. The next prime is 12580397. The reversal of 12580380 is 8308521.

It is a happy number.

12580380 is a `hidden beast` number, since 1 + 2 + 580 + 3 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 11109 + ... + 12188.

It is an arithmetic number, because the mean of its divisors is an integer number (815430).

Almost surely, 212580380 is an apocalyptic number.

12580380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12580380 is an abundant number, since it is smaller than the sum of its proper divisors (26560260).

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

12580380 is a wasteful number, since it uses less digits than its factorization.

12580380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23315 (or 23307 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 12580380 is about 3546.8831387572. The cubic root of 12580380 is about 232.5758337436.

The spelling of 12580380 in words is "twelve million, five hundred eighty thousand, three hundred eighty".

Divisors: 1 2 3 4 5 6 9 10 12 15 18 20 27 30 36 45 54 60 90 108 135 180 270 540 23297 46594 69891 93188 116485 139782 209673 232970 279564 349455 419346 465940 629019 698910 838692 1048365 1258038 1397820 2096730 2516076 3145095 4193460 6290190 12580380