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308290 = 2530829
BaseRepresentation
bin1001011010001000010
3120122220011
41023101002
534331130
610335134
72422543
oct1132102
9518804
10308290
111a0694
1212a4aa
13aa428
14804ca
156152a
hex4b442

308290 has 8 divisors (see below), whose sum is σ = 554940. Its totient is φ = 123312.

The previous prime is 308263. The next prime is 308291. The reversal of 308290 is 92803.

It can be written as a sum of positive squares in 2 ways, for example, as 301401 + 6889 = 549^2 + 83^2 .

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

It is not an unprimeable number, because it can be changed into a prime (308291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15405 + ... + 15424.

2308290 is an apocalyptic number.

308290 is a deficient number, since it is larger than the sum of its proper divisors (246650).

308290 is a wasteful number, since it uses less digits than its factorization.

308290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30836.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 308290 is about 555.2386874129. The cubic root of 308290 is about 67.5543229823.

The spelling of 308290 in words is "three hundred eight thousand, two hundred ninety".

Divisors: 1 2 5 10 30829 61658 154145 308290