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28380182350 = 25213103142349
BaseRepresentation
bin11010011011100101…
…110011011101001110
32201020212022122021211
4122123211303131032
5431110311313400
621012045445034
72023200366262
oct323345633516
981225278254
1028380182350
1111043967063
12560057077a
1328a3910c10
1415332760a2
15b11812dba
hex69b97374e

28380182350 has 48 divisors (see below), whose sum is σ = 56904170400. Its totient is φ = 10468425600.

The previous prime is 28380182339. The next prime is 28380182357. The reversal of 28380182350 is 5328108382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28380182357) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 648976 + ... + 691324.

It is an arithmetic number, because the mean of its divisors is an integer number (1185503550).

Almost surely, 228380182350 is an apocalyptic number.

28380182350 is an abundant number, since it is smaller than the sum of its proper divisors (28523988050).

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

28380182350 is a wasteful number, since it uses less digits than its factorization.

28380182350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43405 (or 43400 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 28380182350 in words is "twenty-eight billion, three hundred eighty million, one hundred eighty-two thousand, three hundred fifty".

Divisors: 1 2 5 10 13 25 26 50 65 130 325 650 1031 2062 5155 10310 13403 25775 26806 42349 51550 67015 84698 134030 211745 335075 423490 550537 670150 1058725 1101074 2117450 2752685 5505370 13763425 27526850 43661819 87323638 218309095 436618190 567603647 1091545475 1135207294 2183090950 2838018235 5676036470 14190091175 28380182350