Search a number
BaseRepresentation
bin1011001011000
321211212
41121120
5140340
642252
722451
oct13130
97755
105720
114330
123388
1327b0
142128
151a65
hex1658

5720 has 32 divisors (see below), whose sum is σ = 15120. Its totient is φ = 1920.

The previous prime is 5717. The next prime is 5737. The reversal of 5720 is 275.

Added to its reverse (275) it gives a triangular number (5995 = T109).

5720 is nontrivially palindromic in base 3.

It is a plaindrome in base 12.

It is a nialpdrome in base 9 and base 11.

It is a zygodrome in base 9 and base 12.

It is a junction number, because it is equal to n+sod(n) for n = 5695 and 5704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434 + ... + 446.

25720 is an apocalyptic number.

5720 is the 44-th octagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7560).

5720 is an abundant number, since it is smaller than the sum of its proper divisors (9400).

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

5720 is a wasteful number, since it uses less digits than its factorization.

5720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35 (or 31 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 14.

The square root of 5720 is about 75.6306816048. The cubic root of 5720 is about 17.8840280735.

Adding to 5720 its reverse (275), we get a palindrome (5995).

Subtracting from 5720 its reverse (275), we obtain a palindrome (5445).

It can be divided in two parts, 57 and 20, that added together give a palindrome (77).

The spelling of 5720 in words is "five thousand, seven hundred twenty".