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52378180 = 2252618909
BaseRepresentation
bin1100011111001…
…1101001000100
310122120002100121
43013303221010
5101402100210
65110351324
71204131031
oct307635104
9118502317
1052378180
1127625558
121565b544
13ab0ba0a
146d56388
1548e96da
hex31f3a44

52378180 has 12 divisors (see below), whose sum is σ = 109994220. Its totient is φ = 20951264.

The previous prime is 52378159. The next prime is 52378181. The reversal of 52378180 is 8187325.

52378180 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9449476 + 42928704 = 3074^2 + 6552^2 .

It is a super-2 number, since 2×523781802 = 5486947480224800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (52378181) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1309435 + ... + 1309474.

It is an arithmetic number, because the mean of its divisors is an integer number (9166185).

Almost surely, 252378180 is an apocalyptic number.

It is an amenable number.

52378180 is an abundant number, since it is smaller than the sum of its proper divisors (57616040).

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

52378180 is a wasteful number, since it uses less digits than its factorization.

52378180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2618918 (or 2618916 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 52378180 is about 7237.2771122847. The cubic root of 52378180 is about 374.1537777835.

The spelling of 52378180 in words is "fifty-two million, three hundred seventy-eight thousand, one hundred eighty".

Divisors: 1 2 4 5 10 20 2618909 5237818 10475636 13094545 26189090 52378180