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28854917 = 713317087
BaseRepresentation
bin110111000010…
…0101010000101
32000021222111122
41232010222011
524341324132
62510243325
7500156060
oct156045205
960258448
1028854917
1115319143
1297b6545
135c93a20
143b918d7
1527ee912
hex1b84a85

28854917 has 8 divisors (see below), whose sum is σ = 35513856. Its totient is φ = 22830192.

The previous prime is 28854887. The next prime is 28854923. The reversal of 28854917 is 71945882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28854917 - 210 = 28853893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28854937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158453 + ... + 158634.

It is an arithmetic number, because the mean of its divisors is an integer number (4439232).

Almost surely, 228854917 is an apocalyptic number.

It is an amenable number.

28854917 is a deficient number, since it is larger than the sum of its proper divisors (6658939).

28854917 is a wasteful number, since it uses less digits than its factorization.

28854917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317107.

The product of its digits is 161280, while the sum is 44.

The square root of 28854917 is about 5371.6772985726. The cubic root of 28854917 is about 306.7184798769.

The spelling of 28854917 in words is "twenty-eight million, eight hundred fifty-four thousand, nine hundred seventeen".

Divisors: 1 7 13 91 317087 2219609 4122131 28854917