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28887147 = 323209683
BaseRepresentation
bin110111000110…
…0100001101011
32000100121201100
41232030201223
524343342042
62511052443
7500352042
oct156144153
960317640
1028887147
1115340383
129811123
135ca55b3
143b9d559
15280924c
hex1b8c86b

28887147 has 6 divisors (see below), whose sum is σ = 41725892. Its totient is φ = 19258092.

The previous prime is 28887143. The next prime is 28887151. The reversal of 28887147 is 74178882.

It is an interprime number because it is at equal distance from previous prime (28887143) and next prime (28887151).

It is not a de Polignac number, because 28887147 - 22 = 28887143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28887143) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1604833 + ... + 1604850.

Almost surely, 228887147 is an apocalyptic number.

28887147 is a deficient number, since it is larger than the sum of its proper divisors (12838745).

28887147 is a wasteful number, since it uses less digits than its factorization.

28887147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3209689 (or 3209686 counting only the distinct ones).

The product of its digits is 200704, while the sum is 45.

The square root of 28887147 is about 5374.6764553785. The cubic root of 28887147 is about 306.8326355600.

The spelling of 28887147 in words is "twenty-eight million, eight hundred eighty-seven thousand, one hundred forty-seven".

Divisors: 1 3 9 3209683 9629049 28887147