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28069859 = 191477361
BaseRepresentation
bin110101100010…
…0111111100011
31221211002121102
41223010333203
524141213414
62441345015
7460406216
oct153047743
957732542
1028069859
1114932334
12949816b
135a7a5ac
143a2977d
1526e6ede
hex1ac4fe3

28069859 has 4 divisors (see below), whose sum is σ = 29547240. Its totient is φ = 26592480.

The previous prime is 28069837. The next prime is 28069889. The reversal of 28069859 is 95896082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28069859 - 28 = 28069603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28069889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 738662 + ... + 738699.

It is an arithmetic number, because the mean of its divisors is an integer number (7386810).

Almost surely, 228069859 is an apocalyptic number.

28069859 is a deficient number, since it is larger than the sum of its proper divisors (1477381).

28069859 is a wasteful number, since it uses less digits than its factorization.

28069859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477380.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 28069859 is about 5298.0995649384. The cubic root of 28069859 is about 303.9112268205.

The spelling of 28069859 in words is "twenty-eight million, sixty-nine thousand, eight hundred fifty-nine".

Divisors: 1 19 1477361 28069859