Search a number
-
+
808253285 = 57216671979
BaseRepresentation
bin110000001011001…
…111011101100101
32002022212112001212
4300023033131211
53123403101120
6212111401205
726013016400
oct6013173545
92068775055
10808253285
11385268724
121a6823205
13cb5b26a8
14794b6d37
154ae576c5
hex302cf765

808253285 has 24 divisors (see below), whose sum is σ = 1129502880. Its totient is φ = 553618464.

The previous prime is 808253269. The next prime is 808253291. The reversal of 808253285 is 582352808.

It is not a de Polignac number, because 808253285 - 24 = 808253269 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 407426 + ... + 409404.

It is an arithmetic number, because the mean of its divisors is an integer number (47062620).

Almost surely, 2808253285 is an apocalyptic number.

It is an amenable number.

808253285 is a deficient number, since it is larger than the sum of its proper divisors (321249595).

808253285 is a wasteful number, since it uses less digits than its factorization.

808253285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3665 (or 3658 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 41.

The square root of 808253285 is about 28429.7957256115. The cubic root of 808253285 is about 931.4992140544.

The spelling of 808253285 in words is "eight hundred eight million, two hundred fifty-three thousand, two hundred eighty-five".

Divisors: 1 5 7 35 49 245 1667 1979 8335 9895 11669 13853 58345 69265 81683 96971 408415 484855 3298993 16494965 23092951 115464755 161650657 808253285