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28200801 = 375112517
BaseRepresentation
bin110101110010…
…0111101100001
31222001202020010
41223210331201
524204411201
62444235133
7461463036
oct153447541
958052203
1028200801
1114a11752
12953baa9
135ac5085
143a6138d
152720bd6
hex1ae4f61

28200801 has 8 divisors (see below), whose sum is σ = 37654144. Its totient is φ = 18774000.

The previous prime is 28200797. The next prime is 28200833. The reversal of 28200801 is 10800282.

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

It is not a de Polignac number, because 28200801 - 22 = 28200797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28200871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4006 + ... + 8511.

It is an arithmetic number, because the mean of its divisors is an integer number (4706768).

Almost surely, 228200801 is an apocalyptic number.

It is an amenable number.

28200801 is a deficient number, since it is larger than the sum of its proper divisors (9453343).

28200801 is a wasteful number, since it uses less digits than its factorization.

28200801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13271.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 28200801 is about 5310.4426369183. The cubic root of 28200801 is about 304.3830618083.

The spelling of 28200801 in words is "twenty-eight million, two hundred thousand, eight hundred one".

Divisors: 1 3 751 2253 12517 37551 9400267 28200801