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28085656 = 234185627
BaseRepresentation
bin110101100100…
…0110110011000
31221211220021111
41223020312120
524142220111
62441550104
7460503244
oct153106630
957756244
1028085656
1114943195
1294a5334
135a84841
143a31424
1526eba21
hex1ac8d98

28085656 has 16 divisors (see below), whose sum is σ = 53945640. Its totient is φ = 13700160.

The previous prime is 28085653. The next prime is 28085657. The reversal of 28085656 is 65658082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28085653) 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, 42486 + ... + 43141.

Almost surely, 228085656 is an apocalyptic number.

It is an amenable number.

28085656 is a deficient number, since it is larger than the sum of its proper divisors (25859984).

28085656 is a wasteful number, since it uses less digits than its factorization.

28085656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85674 (or 85670 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 28085656 is about 5299.5901728341. The cubic root of 28085656 is about 303.9682272888.

It can be divided in two parts, 2808 and 5656, that added together give a square (8464 = 922).

The spelling of 28085656 in words is "twenty-eight million, eighty-five thousand, six hundred fifty-six".

Divisors: 1 2 4 8 41 82 164 328 85627 171254 342508 685016 3510707 7021414 14042828 28085656