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104490 = 235543
BaseRepresentation
bin11001100000101010
312022100000
4121200222
511320430
62123430
7613431
oct314052
9168300
10104490
1171561
1250576
1338739
142a118
1520e60
hex1982a

104490 has 48 divisors (see below), whose sum is σ = 288288. Its totient is φ = 27216.

The previous prime is 104479. The next prime is 104491. The reversal of 104490 is 94401.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 104490.

It is not an unprimeable number, because it can be changed into a prime (104491) by changing a digit.

104490 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2409 + ... + 2451.

It is an arithmetic number, because the mean of its divisors is an integer number (6006).

2104490 is an apocalyptic number.

104490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

104490 is the 162-nd decagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 104490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144144).

104490 is an abundant number, since it is smaller than the sum of its proper divisors (183798).

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

104490 is an equidigital number, since it uses as much as digits as its factorization.

104490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65 (or 53 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 104490 is about 323.2491299292. The cubic root of 104490 is about 47.1004340907.

Adding to 104490 its reverse (94401), we get a palindrome (198891).

The spelling of 104490 in words is "one hundred four thousand, four hundred ninety".

Divisors: 1 2 3 5 6 9 10 15 18 27 30 43 45 54 81 86 90 129 135 162 215 243 258 270 387 405 430 486 645 774 810 1161 1215 1290 1935 2322 2430 3483 3870 5805 6966 10449 11610 17415 20898 34830 52245 104490