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22808680 = 235570217
BaseRepresentation
bin101011100000…
…0100001101000
31120220210121221
41113000201220
521314334210
62132511424
7364604416
oct127004150
946823557
1022808680
1111969554
12777b574
13495797b
14305a2b6
1520081da
hex15c0868

22808680 has 16 divisors (see below), whose sum is σ = 51319620. Its totient is φ = 9123456.

The previous prime is 22808671. The next prime is 22808749. The reversal of 22808680 is 8680822.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21958596 + 850084 = 4686^2 + 922^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285069 + ... + 285148.

Almost surely, 222808680 is an apocalyptic number.

22808680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22808680 is an abundant number, since it is smaller than the sum of its proper divisors (28510940).

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

22808680 is a wasteful number, since it uses less digits than its factorization.

22808680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570228 (or 570224 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 22808680 is about 4775.8433810166. The cubic root of 22808680 is about 283.5959671664.

The spelling of 22808680 in words is "twenty-two million, eight hundred eight thousand, six hundred eighty".

Divisors: 1 2 4 5 8 10 20 40 570217 1140434 2280868 2851085 4561736 5702170 11404340 22808680