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82228307720 = 23513158131361
BaseRepresentation
bin100110010010100110…
…0000110011100001000
321212020122001211112112
41030211030012130020
52321400421321340
6101435234001452
75640460040366
oct1144514063410
9255218054475
1082228307720
1131966810709
1213b2a116288
1379a59980b0
143da0aa4636
152213e2d065
hex1325306708

82228307720 has 32 divisors (see below), whose sum is σ = 199245516120. Its totient is φ = 30361221120.

The previous prime is 82228307719. The next prime is 82228307747. The reversal of 82228307720 is 2770382228.

It can be written as a sum of positive squares in 4 ways, for example, as 31793029636 + 50435278084 = 178306^2 + 224578^2 .

It is a super-2 number, since 2×822283077202 (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79065161 + ... + 79066200.

Almost surely, 282228307720 is an apocalyptic number.

It is an amenable number.

82228307720 is an abundant number, since it is smaller than the sum of its proper divisors (117017208400).

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

82228307720 is a wasteful number, since it uses less digits than its factorization.

82228307720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158131385 (or 158131381 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 41.

Adding to 82228307720 its reverse (2770382228), we get a palindrome (84998689948).

The spelling of 82228307720 in words is "eighty-two billion, two hundred twenty-eight million, three hundred seven thousand, seven hundred twenty".

Divisors: 1 2 4 5 8 10 13 20 26 40 52 65 104 130 260 520 158131361 316262722 632525444 790656805 1265050888 1581313610 2055707693 3162627220 4111415386 6325254440 8222830772 10278538465 16445661544 20557076930 41114153860 82228307720