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81362204 = 227111741379
BaseRepresentation
bin1001101100101…
…11110100011100
312200002121221222
410312113310130
5131312042304
612023512512
72005365410
oct466276434
9180077858
1081362204
1141a216a0
12232b8738
1313b19421
14ab3cd40
1572224be
hex4d97d1c

81362204 has 96 divisors (see below), whose sum is σ = 193052160. Its totient is φ = 29030400.

The previous prime is 81362189. The next prime is 81362207. The reversal of 81362204 is 40226318.

81362204 = T219 + T220 + ... + T792.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81362207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 214487 + ... + 214865.

It is an arithmetic number, because the mean of its divisors is an integer number (2010960).

Almost surely, 281362204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81362204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96526080).

81362204 is an abundant number, since it is smaller than the sum of its proper divisors (111689956).

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

81362204 is a wasteful number, since it uses less digits than its factorization.

81362204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459 (or 457 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 81362204 is about 9020.0999994457. The cubic root of 81362204 is about 433.3188363329.

The spelling of 81362204 in words is "eighty-one million, three hundred sixty-two thousand, two hundred four".

Divisors: 1 2 4 7 11 14 17 22 28 34 41 44 68 77 82 119 154 164 187 238 287 308 374 379 451 476 574 697 748 758 902 1148 1309 1394 1516 1804 2618 2653 2788 3157 4169 4879 5236 5306 6314 6443 7667 8338 9758 10612 12628 12886 15334 15539 16676 19516 25772 29183 30668 31078 45101 53669 58366 62156 70873 90202 107338 108773 116732 141746 170929 180404 214676 217546 264163 283492 341858 435092 496111 528326 683716 992222 1056652 1196503 1849141 1984444 2393006 2905793 3698282 4786012 5811586 7396564 11623172 20340551 40681102 81362204