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28829045 = 572928403
BaseRepresentation
bin110110111111…
…0010101110101
32000020200000102
41231332111311
524340012140
62505523445
7500020460
oct155762565
960220012
1028829045
1115300763
1297a3585
135c8500b
143b862d7
1527e6e15
hex1b7e575

28829045 has 16 divisors (see below), whose sum is σ = 40901760. Its totient is φ = 19086144.

The previous prime is 28829033. The next prime is 28829057. The reversal of 28829045 is 54092882.

It is an interprime number because it is at equal distance from previous prime (28829033) and next prime (28829057).

It is not a de Polignac number, because 28829045 - 24 = 28829029 is a prime.

It is a super-2 number, since 2×288290452 = 1662227671224050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13187 + ... + 15216.

It is an arithmetic number, because the mean of its divisors is an integer number (2556360).

Almost surely, 228829045 is an apocalyptic number.

It is an amenable number.

28829045 is a deficient number, since it is larger than the sum of its proper divisors (12072715).

28829045 is a wasteful number, since it uses less digits than its factorization.

28829045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28444.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 28829045 is about 5369.2685721614. The cubic root of 28829045 is about 306.6267821212.

The spelling of 28829045 in words is "twenty-eight million, eight hundred twenty-nine thousand, forty-five".

Divisors: 1 5 7 29 35 145 203 1015 28403 142015 198821 823687 994105 4118435 5765809 28829045