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80680808 = 2313775777
BaseRepresentation
bin1001100111100…
…01011101101000
312121211000021002
410303301131220
5131123241213
612001134132
71666530005
oct463613550
9177730232
1080680808
11415a675a
122302a348
131393b230
14aa028ac
15713a658
hex4cf1768

80680808 has 16 divisors (see below), whose sum is σ = 162913380. Its totient is φ = 37237248.

The previous prime is 80680777. The next prime is 80680823. The reversal of 80680808 is 80808608.

It can be written as a sum of positive squares in 2 ways, for example, as 79245604 + 1435204 = 8902^2 + 1198^2 .

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, 387785 + ... + 387992.

Almost surely, 280680808 is an apocalyptic number.

It is an amenable number.

80680808 is an abundant number, since it is smaller than the sum of its proper divisors (82232572).

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

80680808 is a wasteful number, since it uses less digits than its factorization.

80680808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775796 (or 775792 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 38.

The square root of 80680808 is about 8982.2496068635. The cubic root of 80680808 is about 432.1057839939.

The spelling of 80680808 in words is "eighty million, six hundred eighty thousand, eight hundred eight".

Divisors: 1 2 4 8 13 26 52 104 775777 1551554 3103108 6206216 10085101 20170202 40340404 80680808