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80236385 = 541391397
BaseRepresentation
bin1001100100001…
…00111101100001
312120222102121222
410302010331201
5131020031020
611543424425
71662666215
oct462047541
9176872558
1080236385
1141322869
1222a55115
1313813b68
14a928945
15709db25
hex4c84f61

80236385 has 8 divisors (see below), whose sum is σ = 98632296. Its totient is φ = 62623360.

The previous prime is 80236369. The next prime is 80236391. The reversal of 80236385 is 58363208.

It can be written as a sum of positive squares in 4 ways, for example, as 1364224 + 78872161 = 1168^2 + 8881^2 .

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

It is not a de Polignac number, because 80236385 - 24 = 80236369 is a prime.

It is a Duffinian 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, 195494 + ... + 195903.

It is an arithmetic number, because the mean of its divisors is an integer number (12329037).

Almost surely, 280236385 is an apocalyptic number.

It is an amenable number.

80236385 is a deficient number, since it is larger than the sum of its proper divisors (18395911).

80236385 is a wasteful number, since it uses less digits than its factorization.

80236385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391443.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 80236385 is about 8957.4764861539. The cubic root of 80236385 is about 431.3109173905.

The spelling of 80236385 in words is "eighty million, two hundred thirty-six thousand, three hundred eighty-five".

Divisors: 1 5 41 205 391397 1956985 16047277 80236385