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28069495 = 537712137
BaseRepresentation
bin110101100010…
…0111001110111
31221211002002221
41223010321313
524141210440
62441343211
7460405156
oct153047167
957732087
1028069495
1114932033
129497b07
135a7a38c
143a2959d
1526e6d4a
hex1ac4e77

28069495 has 16 divisors (see below), whose sum is σ = 35097408. Its totient is φ = 21530880.

The previous prime is 28069493. The next prime is 28069523. The reversal of 28069495 is 59496082.

It is not a de Polignac number, because 28069495 - 21 = 28069493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28069493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12067 + ... + 14203.

It is an arithmetic number, because the mean of its divisors is an integer number (2193588).

Almost surely, 228069495 is an apocalyptic number.

28069495 is a deficient number, since it is larger than the sum of its proper divisors (7027913).

28069495 is a wasteful number, since it uses less digits than its factorization.

28069495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2250.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 28069495 is about 5298.0652128867. The cubic root of 28069495 is about 303.9099131437.

The spelling of 28069495 in words is "twenty-eight million, sixty-nine thousand, four hundred ninety-five".

Divisors: 1 5 37 71 185 355 2137 2627 10685 13135 79069 151727 395345 758635 5613899 28069495