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68388 = 22341139
BaseRepresentation
bin10000101100100100
310110210220
4100230210
54142023
61244340
7403245
oct205444
9113726
1068388
1147421
12336b0
1325188
141accc
15153e3
hex10b24

68388 has 24 divisors (see below), whose sum is σ = 164640. Its totient is φ = 22080.

The previous prime is 68371. The next prime is 68389. The reversal of 68388 is 88386.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (68389) by changing a digit.

68388 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, 423 + ... + 561.

It is an arithmetic number, because the mean of its divisors is an integer number (6860).

268388 is an apocalyptic number.

It is an amenable number.

68388 is an abundant number, since it is smaller than the sum of its proper divisors (96252).

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 (82320).

68388 is a wasteful number, since it uses less digits than its factorization.

68388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 185 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 68388 is about 261.5109940328. The cubic root of 68388 is about 40.8940353128.

The spelling of 68388 in words is "sixty-eight thousand, three hundred eighty-eight".

Divisors: 1 2 3 4 6 12 41 82 123 139 164 246 278 417 492 556 834 1668 5699 11398 17097 22796 34194 68388