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28280782 = 216784673
BaseRepresentation
bin110101111100…
…0011111001110
31222012210221101
41223320133032
524214441112
62450053314
7462245155
oct153703716
958183841
1028280782
1114a66852
12957a23a
135b225ba
143a8259c
152739757
hex1af87ce

28280782 has 8 divisors (see below), whose sum is σ = 42675696. Its totient is φ = 14055552.

The previous prime is 28280779. The next prime is 28280783. The reversal of 28280782 is 28708282.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28280783) 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, 42003 + ... + 42670.

It is an arithmetic number, because the mean of its divisors is an integer number (5334462).

Almost surely, 228280782 is an apocalyptic number.

28280782 is a deficient number, since it is larger than the sum of its proper divisors (14394914).

28280782 is a wasteful number, since it uses less digits than its factorization.

28280782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84842.

The product of its (nonzero) digits is 28672, while the sum is 37.

The square root of 28280782 is about 5317.9678449573. The cubic root of 28280782 is about 304.6705463475.

The spelling of 28280782 in words is "twenty-eight million, two hundred eighty thousand, seven hundred eighty-two".

Divisors: 1 2 167 334 84673 169346 14140391 28280782