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28664843 is a prime number
BaseRepresentation
bin110110101011…
…0010000001011
31222221022202212
41231112100023
524314233333
62502215335
7465434654
oct155262013
958838685
1028664843
11151a9359
12972454b
135c2835c
143b4252b
1527b3448
hex1b5640b

28664843 has 2 divisors, whose sum is σ = 28664844. Its totient is φ = 28664842.

The previous prime is 28664833. The next prime is 28664849. The reversal of 28664843 is 34846682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28664843 - 222 = 24470539 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28664843.

It is not a weakly prime, because it can be changed into another prime (28664849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14332421 + 14332422.

It is an arithmetic number, because the mean of its divisors is an integer number (14332422).

Almost surely, 228664843 is an apocalyptic number.

28664843 is a deficient number, since it is larger than the sum of its proper divisors (1).

28664843 is an equidigital number, since it uses as much as digits as its factorization.

28664843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 41.

The square root of 28664843 is about 5353.9558272365. The cubic root of 28664843 is about 306.0435205163.

The spelling of 28664843 in words is "twenty-eight million, six hundred sixty-four thousand, eight hundred forty-three".