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28662241 = 195328463
BaseRepresentation
bin110110101010…
…1100111100001
31222221012012111
41231111213201
524314142431
62502155321
7465424246
oct155254741
958835174
1028662241
11151a7403
129722b41
135c2710a
143b415cd
1527b27b1
hex1b559e1

28662241 has 8 divisors (see below), whose sum is σ = 30741120. Its totient is φ = 26640432.

The previous prime is 28662199. The next prime is 28662247. The reversal of 28662241 is 14226682.

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

It is not a de Polignac number, because 28662241 - 27 = 28662113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28662247) 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, 13225 + ... + 15238.

It is an arithmetic number, because the mean of its divisors is an integer number (3842640).

Almost surely, 228662241 is an apocalyptic number.

It is an amenable number.

28662241 is a deficient number, since it is larger than the sum of its proper divisors (2078879).

28662241 is a wasteful number, since it uses less digits than its factorization.

28662241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28535.

The product of its digits is 9216, while the sum is 31.

The square root of 28662241 is about 5353.7128238261. The cubic root of 28662241 is about 306.0342600512.

The spelling of 28662241 in words is "twenty-eight million, six hundred sixty-two thousand, two hundred forty-one".

Divisors: 1 19 53 1007 28463 540797 1508539 28662241