Search a number
-
+
80620 = 22529139
BaseRepresentation
bin10011101011101100
311002120221
4103223230
510034440
61421124
7454021
oct235354
9132527
1080620
1155631
123a7a4
132a907
1421548
1518d4a
hex13aec

80620 has 24 divisors (see below), whose sum is σ = 176400. Its totient is φ = 30912.

The previous prime is 80611. The next prime is 80621. The reversal of 80620 is 2608.

80620 = T21 + T22 + ... + T78.

It is a junction number, because it is equal to n+sod(n) for n = 80594 and 80603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80621) by changing a digit.

80620 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 511 + ... + 649.

It is an arithmetic number, because the mean of its divisors is an integer number (7350).

280620 is an apocalyptic number.

80620 is the 232-nd pentagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88200).

80620 is an abundant number, since it is smaller than the sum of its proper divisors (95780).

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

80620 is a wasteful number, since it uses less digits than its factorization.

80620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 80620 is about 283.9366126444. The cubic root of 80620 is about 43.1997199342.

The spelling of 80620 in words is "eighty thousand, six hundred twenty".

Divisors: 1 2 4 5 10 20 29 58 116 139 145 278 290 556 580 695 1390 2780 4031 8062 16124 20155 40310 80620