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80288165 = 5137117209
BaseRepresentation
bin1001100100100…
…01100110100101
312121002001122202
410302101212211
5131023210130
611544504245
71663303166
oct462214645
9177061582
1080288165
1141358761
1222a7b085
13138315b9
14a93d76d
1570ae145
hex4c919a5

80288165 has 8 divisors (see below), whose sum is σ = 97049880. Its totient is φ = 63761152.

The previous prime is 80288119. The next prime is 80288231. The reversal of 80288165 is 56188208.

It can be written as a sum of positive squares in 4 ways, for example, as 1682209 + 78605956 = 1297^2 + 8866^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80288165 - 212 = 80284069 is a prime.

It is a Curzon number.

It is a congruent number.

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, 57920 + ... + 59289.

It is an arithmetic number, because the mean of its divisors is an integer number (12131235).

Almost surely, 280288165 is an apocalyptic number.

It is an amenable number.

80288165 is a deficient number, since it is larger than the sum of its proper divisors (16761715).

80288165 is a wasteful number, since it uses less digits than its factorization.

80288165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117351.

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 80288165 is about 8960.3663429572. The cubic root of 80288165 is about 431.4036786185.

The spelling of 80288165 in words is "eighty million, two hundred eighty-eight thousand, one hundred sixty-five".

Divisors: 1 5 137 685 117209 586045 16057633 80288165