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104780 = 22513231
BaseRepresentation
bin11001100101001100
312022201202
4121211030
511323110
62125032
7614324
oct314514
9168652
10104780
11717a5
1250778
1338900
142a284
15210a5
hex1994c

104780 has 36 divisors (see below), whose sum is σ = 245952. Its totient is φ = 37440.

The previous prime is 104779. The next prime is 104789. The reversal of 104780 is 87401.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (104789) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3365 + ... + 3395.

It is an arithmetic number, because the mean of its divisors is an integer number (6832).

2104780 is an apocalyptic number.

104780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 104780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122976).

104780 is an abundant number, since it is smaller than the sum of its proper divisors (141172).

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

104780 is a wasteful number, since it uses less digits than its factorization.

104780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 104780 is about 323.6973895477. The cubic root of 104780 is about 47.1439677905.

The spelling of 104780 in words is "one hundred four thousand, seven hundred eighty".

Divisors: 1 2 4 5 10 13 20 26 31 52 62 65 124 130 155 169 260 310 338 403 620 676 806 845 1612 1690 2015 3380 4030 5239 8060 10478 20956 26195 52390 104780