Search a number
-
+
79638 = 23131021
BaseRepresentation
bin10011011100010110
311001020120
4103130112
510022023
61412410
7451116
oct233426
9131216
1079638
1154919
123a106
132a330
1421046
15188e3
hex13716

79638 has 16 divisors (see below), whose sum is σ = 171696. Its totient is φ = 24480.

The previous prime is 79633. The next prime is 79657. The reversal of 79638 is 83697.

It is a happy number.

It is a super-2 number, since 2×796382 = 12684422088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 79599 and 79608.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 79638.

It is not an unprimeable number, because it can be changed into a prime (79631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433 + ... + 588.

It is an arithmetic number, because the mean of its divisors is an integer number (10731).

279638 is an apocalyptic number.

79638 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

79638 is an abundant number, since it is smaller than the sum of its proper divisors (92058).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85848).

79638 is a wasteful number, since it uses less digits than its factorization.

79638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039.

The product of its digits is 9072, while the sum is 33.

The square root of 79638 is about 282.2020552725. The cubic root of 79638 is about 43.0236034105.

It can be divided in two parts, 79 and 638, that added together give a palindrome (717).

The spelling of 79638 in words is "seventy-nine thousand, six hundred thirty-eight".

Divisors: 1 2 3 6 13 26 39 78 1021 2042 3063 6126 13273 26546 39819 79638