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82744025 = 5271337983
BaseRepresentation
bin1001110111010…
…01001011011001
312202200211110112
410323221023121
5132140302100
612113254105
72023212140
oct473511331
9182624415
1082744025
11427858a1
1223864335
13141b1380
14adbc757
1573e6b35
hex4ee92d9

82744025 has 48 divisors (see below), whose sum is σ = 129825024. Its totient is φ = 50906880.

The previous prime is 82743979. The next prime is 82744033. The reversal of 82744025 is 52044728.

It is not a de Polignac number, because 82744025 - 28 = 82743769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 82743982 and 82744000.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 83684 + ... + 84666.

It is an arithmetic number, because the mean of its divisors is an integer number (2704688).

Almost surely, 282744025 is an apocalyptic number.

It is an amenable number.

82744025 is a deficient number, since it is larger than the sum of its proper divisors (47080999).

82744025 is a wasteful number, since it uses less digits than its factorization.

82744025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050 (or 1045 counting only the distinct ones).

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

The square root of 82744025 is about 9096.3742776999. The cubic root of 82744025 is about 435.7581792460.

The spelling of 82744025 in words is "eighty-two million, seven hundred forty-four thousand, twenty-five".

Divisors: 1 5 7 13 25 35 37 65 91 175 185 259 325 455 481 925 983 1295 2275 2405 3367 4915 6475 6881 12025 12779 16835 24575 34405 36371 63895 84175 89453 172025 181855 254597 319475 447265 472823 909275 1272985 2236325 2364115 3309761 6364925 11820575 16548805 82744025