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80688208 = 2429173897
BaseRepresentation
bin1001100111100…
…11010001010000
312121211101102011
410303303101100
5131124010313
612001232304
71666560406
oct463632120
9177741364
1080688208
1141601277
1223032694
1313941703
14aa05476
15713c93d
hex4cf3450

80688208 has 20 divisors (see below), whose sum is σ = 161725140. Its totient is φ = 38952704.

The previous prime is 80688203. The next prime is 80688227. The reversal of 80688208 is 80288608.

It can be written as a sum of positive squares in 2 ways, for example, as 65415744 + 15272464 = 8088^2 + 3908^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80688203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86485 + ... + 87412.

It is an arithmetic number, because the mean of its divisors is an integer number (8086257).

Almost surely, 280688208 is an apocalyptic number.

It is an amenable number.

80688208 is an abundant number, since it is smaller than the sum of its proper divisors (81036932).

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

80688208 is a wasteful number, since it uses less digits than its factorization.

80688208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173934 (or 173928 counting only the distinct ones).

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

The square root of 80688208 is about 8982.6615209525. The cubic root of 80688208 is about 432.1189944262.

The spelling of 80688208 in words is "eighty million, six hundred eighty-eight thousand, two hundred eight".

Divisors: 1 2 4 8 16 29 58 116 232 464 173897 347794 695588 1391176 2782352 5043013 10086026 20172052 40344104 80688208