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28227524 = 2213542837
BaseRepresentation
bin110101110101…
…1011111000100
31222010002212212
41223223133010
524211240044
62445002552
7461633663
oct153533704
958102785
1028227524
1114a2a836
129553458
135b042a0
143a6adda
152728a9e
hex1aeb7c4

28227524 has 12 divisors (see below), whose sum is σ = 53198124. Its totient is φ = 13028064.

The previous prime is 28227523. The next prime is 28227649. The reversal of 28227524 is 42572282.

It can be written as a sum of positive squares in 2 ways, for example, as 8584900 + 19642624 = 2930^2 + 4432^2 .

It is a super-2 number, since 2×282275242 = 1593586222341152, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28227523) 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, 271367 + ... + 271470.

It is an arithmetic number, because the mean of its divisors is an integer number (4433177).

Almost surely, 228227524 is an apocalyptic number.

It is an amenable number.

28227524 is a deficient number, since it is larger than the sum of its proper divisors (24970600).

28227524 is a wasteful number, since it uses less digits than its factorization.

28227524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542854 (or 542852 counting only the distinct ones).

The product of its digits is 17920, while the sum is 32.

The square root of 28227524 is about 5312.9581214235. The cubic root of 28227524 is about 304.4791756345.

The spelling of 28227524 in words is "twenty-eight million, two hundred twenty-seven thousand, five hundred twenty-four".

Divisors: 1 2 4 13 26 52 542837 1085674 2171348 7056881 14113762 28227524