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8380285 = 55213217
BaseRepresentation
bin11111111101111101111101
3120202202120221
4133331331331
54121132120
6455341341
7131142214
oct37757575
916682527
108380285
114804261
122981851
131975564
14118207b
15b080aa
hex7fdf7d

8380285 has 8 divisors (see below), whose sum is σ = 10078776. Its totient is φ = 6689280.

The previous prime is 8380283. The next prime is 8380291. The reversal of 8380285 is 5820838.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1552516 + 6827769 = 1246^2 + 2613^2 .

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

It is not a de Polignac number, because 8380285 - 21 = 8380283 is a prime.

It is a Duffinian number.

8380285 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8380285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8380283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 997 + ... + 4213.

It is an arithmetic number, because the mean of its divisors is an integer number (1259847).

Almost surely, 28380285 is an apocalyptic number.

It is an amenable number.

8380285 is a deficient number, since it is larger than the sum of its proper divisors (1698491).

8380285 is a wasteful number, since it uses less digits than its factorization.

8380285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3743.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 8380285 is about 2894.8721906157. The cubic root of 8380285 is about 203.1201130185.

The spelling of 8380285 in words is "eight million, three hundred eighty thousand, two hundred eighty-five".

Divisors: 1 5 521 2605 3217 16085 1676057 8380285