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808000920 = 23345249383
BaseRepresentation
bin110000001010010…
…001110110011000
32002022101200220000
4300022101312120
53123322012140
6212102133000
726010615546
oct6012216630
92068350800
10808000920
11385106061
121a6721160
13cb52486c
147944cd96
154ae07a30
hex30291d98

808000920 has 80 divisors (see below), whose sum is σ = 2715791760. Its totient is φ = 215466048.

The previous prime is 808000903. The next prime is 808000927. The reversal of 808000920 is 29000808.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (808000927) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 121452 + ... + 127931.

It is an arithmetic number, because the mean of its divisors is an integer number (33947397).

Almost surely, 2808000920 is an apocalyptic number.

It is an amenable number.

808000920 is an abundant number, since it is smaller than the sum of its proper divisors (1907790840).

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

808000920 is a wasteful number, since it uses less digits than its factorization.

808000920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249406 (or 249393 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 808000920 is about 28425.3569898427. The cubic root of 808000920 is about 931.4022550630.

The spelling of 808000920 in words is "eight hundred eight million, nine hundred twenty", and thus it is an aban number.

Divisors: 1 2 3 4 5 6 8 9 10 12 15 18 20 24 27 30 36 40 45 54 60 72 81 90 108 120 135 162 180 216 270 324 360 405 540 648 810 1080 1620 3240 249383 498766 748149 997532 1246915 1496298 1995064 2244447 2493830 2992596 3740745 4488894 4987660 5985192 6733341 7481490 8977788 9975320 11222235 13466682 14962980 17955576 20200023 22444470 26933364 29925960 33666705 40400046 44888940 53866728 67333410 80800092 89777880 101000115 134666820 161600184 202000230 269333640 404000460 808000920