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80706808 = 23713591879
BaseRepresentation
bin1001100111101…
…11110011111000
312121212022221001
410303313303320
5131130104213
612001454344
71666665550
oct463676370
9177768831
1080706808
1141614246
12230413b4
131394a010
14aa0c160
1571431dd
hex4cf7cf8

80706808 has 64 divisors (see below), whose sum is σ = 189504000. Its totient is φ = 31370112.

The previous prime is 80706767. The next prime is 80706811. The reversal of 80706808 is 80860708.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42013 + ... + 43891.

It is an arithmetic number, because the mean of its divisors is an integer number (2961000).

Almost surely, 280706808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80706808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94752000).

80706808 is an abundant number, since it is smaller than the sum of its proper divisors (108797192).

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

80706808 is a wasteful number, since it uses less digits than its factorization.

80706808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964 (or 1960 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 80706808 is about 8983.6967891843. The cubic root of 80706808 is about 432.1521954601.

It can be divided in two parts, 8070 and 6808, that added together give a triangular number (14878 = T172).

The spelling of 80706808 in words is "eighty million, seven hundred six thousand, eight hundred eight".

Divisors: 1 2 4 7 8 13 14 26 28 52 56 59 91 104 118 182 236 364 413 472 728 767 826 1534 1652 1879 3068 3304 3758 5369 6136 7516 10738 13153 15032 21476 24427 26306 42952 48854 52612 97708 105224 110861 170989 195416 221722 341978 443444 683956 776027 886888 1367912 1441193 1552054 2882386 3104108 5764772 6208216 10088351 11529544 20176702 40353404 80706808