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28095232 = 28112907
BaseRepresentation
bin110101100101…
…1001100000000
31221212101102011
41223023030000
524143021412
62442102304
7460543204
oct153131400
957771364
1028095232
111494a400
1294aa994
135a88cc9
143a34b04
1526ee7a7
hex1acb300

28095232 has 54 divisors (see below), whose sum is σ = 61710404. Its totient is φ = 12756480.

The previous prime is 28095217. The next prime is 28095233. The reversal of 28095232 is 23259082.

It is a super-2 number, since 2×280952322 = 1578684122267648, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28095194 and 28095203.

It is not an unprimeable number, because it can be changed into a prime (28095233) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30523 + ... + 31429.

Almost surely, 228095232 is an apocalyptic number.

28095232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28095232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30855202).

28095232 is an abundant number, since it is smaller than the sum of its proper divisors (33615172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28095232 is an equidigital number, since it uses as much as digits as its factorization.

28095232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945 (or 920 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 28095232 is about 5300.4935619242. The cubic root of 28095232 is about 304.0027700579.

The spelling of 28095232 in words is "twenty-eight million, ninety-five thousand, two hundred thirty-two".

Divisors: 1 2 4 8 11 16 22 32 44 64 88 121 128 176 242 256 352 484 704 907 968 1408 1814 1936 2816 3628 3872 7256 7744 9977 14512 15488 19954 29024 30976 39908 58048 79816 109747 116096 159632 219494 232192 319264 438988 638528 877976 1277056 1755952 2554112 3511904 7023808 14047616 28095232