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130780 = 22513503
BaseRepresentation
bin11111111011011100
320122101201
4133323130
513141110
62445244
71053166
oct377334
9218351
10130780
118a291
1263824
13476b0
1435936
1528b3a
hex1fedc

130780 has 24 divisors (see below), whose sum is σ = 296352. Its totient is φ = 48192.

The previous prime is 130769. The next prime is 130783. The reversal of 130780 is 87031.

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130783) 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 7 ways as a sum of consecutive naturals, for example, 9 + ... + 511.

It is an arithmetic number, because the mean of its divisors is an integer number (12348).

2130780 is an apocalyptic number.

130780 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 130780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148176).

130780 is an abundant number, since it is smaller than the sum of its proper divisors (165572).

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

130780 is a wasteful number, since it uses less digits than its factorization.

130780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 130780 is about 361.6351752803. The cubic root of 130780 is about 50.7590841723.

The spelling of 130780 in words is "one hundred thirty thousand, seven hundred eighty".

Divisors: 1 2 4 5 10 13 20 26 52 65 130 260 503 1006 2012 2515 5030 6539 10060 13078 26156 32695 65390 130780