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64808 = 238101
BaseRepresentation
bin1111110100101000
310021220022
433310220
54033213
61220012
7356642
oct176450
9107808
1064808
1144767
1231608
1323663
1419892
1514308
hexfd28

64808 has 8 divisors (see below), whose sum is σ = 121530. Its totient is φ = 32400.

The previous prime is 64793. The next prime is 64811. The reversal of 64808 is 80846.

It can be written as a sum of positive squares in only one way, i.e., 33124 + 31684 = 182^2 + 178^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 64808.

It is an unprimeable number.

64808 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 as a sum of consecutive naturals, namely, 4043 + ... + 4058.

264808 is an apocalyptic number.

It is an amenable number.

64808 is a deficient number, since it is larger than the sum of its proper divisors (56722).

64808 is a wasteful number, since it uses less digits than its factorization.

64808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8107 (or 8103 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 64808 is about 254.5741542262. The cubic root of 64808 is about 40.1676298578.

The spelling of 64808 in words is "sixty-four thousand, eight hundred eight".

Divisors: 1 2 4 8 8101 16202 32404 64808