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82589725 = 5226912281
BaseRepresentation
bin1001110110000…
…11100000011101
312202101222210201
410323003200131
5132120332400
612110103501
72022000241
oct473034035
9182358721
1082589725
114268a979
12237aab91
131415907a
14ad7c421
1573b606a
hex4ec381d

82589725 has 12 divisors (see below), whose sum is σ = 102800340. Its totient is φ = 65820800.

The previous prime is 82589701. The next prime is 82589729. The reversal of 82589725 is 52798528.

It can be written as a sum of positive squares in 6 ways, for example, as 3059001 + 79530724 = 1749^2 + 8918^2 .

It is not a de Polignac number, because 82589725 - 223 = 74201117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82589729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 585 + ... + 12865.

It is an arithmetic number, because the mean of its divisors is an integer number (8566695).

Almost surely, 282589725 is an apocalyptic number.

It is an amenable number.

82589725 is a deficient number, since it is larger than the sum of its proper divisors (20210615).

82589725 is a wasteful number, since it uses less digits than its factorization.

82589725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12560 (or 12555 counting only the distinct ones).

The product of its digits is 403200, while the sum is 46.

The square root of 82589725 is about 9087.8889187754. Note that the first 3 decimals coincide. The cubic root of 82589725 is about 435.4871452753.

The spelling of 82589725 in words is "eighty-two million, five hundred eighty-nine thousand, seven hundred twenty-five".

Divisors: 1 5 25 269 1345 6725 12281 61405 307025 3303589 16517945 82589725