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228036487 = 71710118973
BaseRepresentation
bin11011001011110…
…00111110000111
3120220002110020211
431211320332013
5431334131422
634343340251
75436164260
oct1545707607
9526073224
10228036487
111077a2208
1264451687
1338322643
14223dd967
1515046577
hexd978f87

228036487 has 16 divisors (see below), whose sum is σ = 278690112. Its totient is φ = 182131200.

The previous prime is 228036469. The next prime is 228036491. The reversal of 228036487 is 784630822.

It is not a de Polignac number, because 228036487 - 215 = 228003719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228036187) by changing a digit.

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, 2533 + ... + 21505.

It is an arithmetic number, because the mean of its divisors is an integer number (17418132).

Almost surely, 2228036487 is an apocalyptic number.

228036487 is a deficient number, since it is larger than the sum of its proper divisors (50653625).

228036487 is a wasteful number, since it uses less digits than its factorization.

228036487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19098.

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 228036487 is about 15100.8770275107. The cubic root of 228036487 is about 610.9440608881.

The spelling of 228036487 in words is "two hundred twenty-eight million, thirty-six thousand, four hundred eighty-seven".

Divisors: 1 7 17 101 119 707 1717 12019 18973 132811 322541 1916273 2257787 13413911 32576641 228036487