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80880628 = 22179971193
BaseRepresentation
bin1001101001000…
…10001111110100
312122012011100211
410310202033310
5131201140003
612005315204
72001321403
oct464421764
9178164324
1080880628
11417228a4
1223105b04
13139ab17a
14aa5563a
15717996d
hex4d223f4

80880628 has 24 divisors (see below), whose sum is σ = 150143112. Its totient is φ = 37991424.

The previous prime is 80880617. The next prime is 80880629. The reversal of 80880628 is 82608808.

It can be written as a sum of positive squares in 4 ways, for example, as 37478884 + 43401744 = 6122^2 + 6588^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80880629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67200 + ... + 68392.

It is an arithmetic number, because the mean of its divisors is an integer number (6255963).

Almost surely, 280880628 is an apocalyptic number.

It is an amenable number.

80880628 is a deficient number, since it is larger than the sum of its proper divisors (69262484).

80880628 is a wasteful number, since it uses less digits than its factorization.

80880628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2211 (or 2209 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 40.

The square root of 80880628 is about 8993.3657770603. The cubic root of 80880628 is about 432.4622181793.

The spelling of 80880628 in words is "eighty million, eight hundred eighty thousand, six hundred twenty-eight".

Divisors: 1 2 4 17 34 68 997 1193 1994 2386 3988 4772 16949 20281 33898 40562 67796 81124 1189421 2378842 4757684 20220157 40440314 80880628