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28356305 = 55671261
BaseRepresentation
bin110110000101…
…0111011010001
31222100122112112
41230022323101
524224400210
62451435105
7463011305
oct154127321
958318475
1028356305
111500856a
1295b5a95
135b4aaa3
143aa1d05
152751d05
hex1b0aed1

28356305 has 4 divisors (see below), whose sum is σ = 34027572. Its totient is φ = 22685040.

The previous prime is 28356283. The next prime is 28356329. The reversal of 28356305 is 50365382.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11282881 + 17073424 = 3359^2 + 4132^2 .

It is not a de Polignac number, because 28356305 - 210 = 28355281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2835626 + ... + 2835635.

It is an arithmetic number, because the mean of its divisors is an integer number (8506893).

Almost surely, 228356305 is an apocalyptic number.

It is an amenable number.

28356305 is a deficient number, since it is larger than the sum of its proper divisors (5671267).

28356305 is an equidigital number, since it uses as much as digits as its factorization.

28356305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5671266.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 28356305 is about 5325.0638493825. The cubic root of 28356305 is about 304.9415098805.

The spelling of 28356305 in words is "twenty-eight million, three hundred fifty-six thousand, three hundred five".

Divisors: 1 5 5671261 28356305