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28160712 = 23322271723
BaseRepresentation
bin110101101101…
…1001011001000
31221222201020100
41223123023020
524202120322
62443325400
7461235126
oct153331310
957881210
1028160712
1114994618
129520860
135aaca58
143a50916
152713dac
hex1adb2c8

28160712 has 48 divisors (see below), whose sum is σ = 76649040. Its totient is φ = 9340128.

The previous prime is 28160707. The next prime is 28160729. The reversal of 28160712 is 21706182.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15483 + ... + 17205.

It is an arithmetic number, because the mean of its divisors is an integer number (1596855).

Almost surely, 228160712 is an apocalyptic number.

It is an amenable number.

28160712 is an abundant number, since it is smaller than the sum of its proper divisors (48488328).

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

28160712 is a wasteful number, since it uses less digits than its factorization.

28160712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1962 (or 1955 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 28160712 is about 5306.6667504188. Note that the first 3 decimals coincide. The cubic root of 28160712 is about 304.2387609512.

Adding to 28160712 its reverse (21706182), we get a palindrome (49866894).

The spelling of 28160712 in words is "twenty-eight million, one hundred sixty thousand, seven hundred twelve".

Divisors: 1 2 3 4 6 8 9 12 18 24 36 72 227 454 681 908 1362 1723 1816 2043 2724 3446 4086 5169 5448 6892 8172 10338 13784 15507 16344 20676 31014 41352 62028 124056 391121 782242 1173363 1564484 2346726 3128968 3520089 4693452 7040178 9386904 14080356 28160712