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52378725 = 3527195989
BaseRepresentation
bin1100011111001…
…1110001100101
310122120010002210
43013303301211
5101402104400
65110354033
71204132440
oct307636145
9118503083
1052378725
1127625a03
121565b919
13ab0c039
146d56657
1548e9950
hex31f3c65

52378725 has 96 divisors (see below), whose sum is σ = 107136000. Its totient is φ = 22049280.

The previous prime is 52378723. The next prime is 52378769. The reversal of 52378725 is 52787325.

It is not a de Polignac number, because 52378725 - 21 = 52378723 is a prime.

It is a super-3 number, since 3×523787253 (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52378721) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 588481 + ... + 588569.

It is an arithmetic number, because the mean of its divisors is an integer number (1116000).

Almost surely, 252378725 is an apocalyptic number.

It is an amenable number.

52378725 is an abundant number, since it is smaller than the sum of its proper divisors (54757275).

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

52378725 is a wasteful number, since it uses less digits than its factorization.

52378725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 182 counting only the distinct ones).

The product of its digits is 117600, while the sum is 39.

The square root of 52378725 is about 7237.3147644689. The cubic root of 52378725 is about 374.1550754810.

The spelling of 52378725 in words is "fifty-two million, three hundred seventy-eight thousand, seven hundred twenty-five".

Divisors: 1 3 5 7 15 19 21 25 35 57 59 75 89 95 105 133 175 177 267 285 295 399 413 445 475 525 623 665 885 1121 1239 1335 1425 1475 1691 1869 1995 2065 2225 3115 3325 3363 4425 5073 5251 5605 6195 6675 7847 8455 9345 9975 10325 11837 15575 15753 16815 23541 25365 26255 28025 30975 35511 36757 39235 42275 46725 59185 78765 84075 99769 110271 117705 126825 131275 177555 183785 196175 295925 299307 393825 498845 551355 588525 698383 887775 918925 1496535 2095149 2494225 2756775 3491915 7482675 10475745 17459575 52378725