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82491732 = 22322291437
BaseRepresentation
bin1001110101010…
…11100101010100
312202020000101100
410322223211110
5132104213412
612104030100
72021111451
oct472534524
9182200340
1082491732
1142623294
1223762330
131412359b
14ad54828
157396edc
hex4eab954

82491732 has 18 divisors (see below), whose sum is σ = 208520858. Its totient is φ = 27497232.

The previous prime is 82491719. The next prime is 82491733. The reversal of 82491732 is 23719428.

It can be written as a sum of positive squares in only one way, i.e., 47279376 + 35212356 = 6876^2 + 5934^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2291437 = 82491732 / (8 + 2 + 4 + 9 + 1 + 7 + 3 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82491733) 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, 1145683 + ... + 1145754.

Almost surely, 282491732 is an apocalyptic number.

It is an amenable number.

82491732 is an abundant number, since it is smaller than the sum of its proper divisors (126029126).

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

82491732 is a wasteful number, since it uses less digits than its factorization.

82491732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2291447 (or 2291442 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 82491732 is about 9082.4959124681. The cubic root of 82491732 is about 435.3148414330.

The spelling of 82491732 in words is "eighty-two million, four hundred ninety-one thousand, seven hundred thirty-two".

Divisors: 1 2 3 4 6 9 12 18 36 2291437 4582874 6874311 9165748 13748622 20622933 27497244 41245866 82491732