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180530808 = 23317942023
BaseRepresentation
bin10101100001010…
…10111001111000
3110120200220201020
422300222321320
5332203441213
625525222440
74321325613
oct1260527170
9416626636
10180530808
11929a5517
1250561a20
132b52b683
1419d9517a
1510cb0923
hexac2ae78

180530808 has 32 divisors (see below), whose sum is σ = 453859200. Its totient is φ = 59839328.

The previous prime is 180530747. The next prime is 180530809. The reversal of 180530808 is 808035081.

180530808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180530809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16716 + ... + 25307.

It is an arithmetic number, because the mean of its divisors is an integer number (14183100).

Almost surely, 2180530808 is an apocalyptic number.

It is an amenable number.

180530808 is an abundant number, since it is smaller than the sum of its proper divisors (273328392).

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

180530808 is a wasteful number, since it uses less digits than its factorization.

180530808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42211 (or 42207 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 180530808 is about 13436.1753486623. The cubic root of 180530808 is about 565.1760831604.

Adding to 180530808 its reverse (808035081), we get a palindrome (988565889).

The spelling of 180530808 in words is "one hundred eighty million, five hundred thirty thousand, eight hundred eight".

Divisors: 1 2 3 4 6 8 12 24 179 358 537 716 1074 1432 2148 4296 42023 84046 126069 168092 252138 336184 504276 1008552 7522117 15044234 22566351 30088468 45132702 60176936 90265404 180530808