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868663556 = 22417576997
BaseRepresentation
bin110011110001101…
…100000100000100
32020112112200101022
4303301230010010
53234334213211
6222110250312
730345342545
oct6361540404
92215480338
10868663556
11406379872
12202ab6998
1310ac74307
14835204cc
15513dbbdb
hex33c6c104

868663556 has 24 divisors (see below), whose sum is σ = 1559518296. Its totient is φ = 423118080.

The previous prime is 868663531. The next prime is 868663559. The reversal of 868663556 is 655366868.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5244100 + 863419456 = 2290^2 + 29384^2 .

It is a junction number, because it is equal to n+sod(n) for n = 868663498 and 868663507.

It is not an unprimeable number, because it can be changed into a prime (868663559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120650 + ... + 127646.

It is an arithmetic number, because the mean of its divisors is an integer number (64979929).

Almost surely, 2868663556 is an apocalyptic number.

It is an amenable number.

868663556 is a deficient number, since it is larger than the sum of its proper divisors (690854740).

868663556 is a wasteful number, since it uses less digits than its factorization.

868663556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7799 (or 7797 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 53.

The square root of 868663556 is about 29473.0988530219. The cubic root of 868663556 is about 954.1511992492.

The spelling of 868663556 in words is "eight hundred sixty-eight million, six hundred sixty-three thousand, five hundred fifty-six".

Divisors: 1 2 4 41 82 164 757 1514 3028 6997 13994 27988 31037 62074 124148 286877 573754 1147508 5296729 10593458 21186916 217165889 434331778 868663556