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83568680 = 23513160709
BaseRepresentation
bin1001111101100…
…10100000101000
312211020201200022
410332302200220
5132343144210
612143100012
72033215316
oct476624050
9184221608
1083568680
1143199428
1223ba1608
131440c830
14b1550b6
15750b155
hex4fb2828

83568680 has 32 divisors (see below), whose sum is σ = 202494600. Its totient is φ = 30855936.

The previous prime is 83568659. The next prime is 83568689. The reversal of 83568680 is 8686538.

It can be written as a sum of positive squares in 4 ways, for example, as 43903876 + 39664804 = 6626^2 + 6298^2 .

It is not an unprimeable number, because it can be changed into a prime (83568689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79835 + ... + 80874.

Almost surely, 283568680 is an apocalyptic number.

It is an amenable number.

83568680 is an abundant number, since it is smaller than the sum of its proper divisors (118925920).

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

83568680 is a wasteful number, since it uses less digits than its factorization.

83568680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160733 (or 160729 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 83568680 is about 9141.5906712125. The cubic root of 83568680 is about 437.2010343878.

It can be divided in two parts, 83568 and 680, that added together give a palindrome (84248).

The spelling of 83568680 in words is "eighty-three million, five hundred sixty-eight thousand, six hundred eighty".

Divisors: 1 2 4 5 8 10 13 20 26 40 52 65 104 130 260 520 160709 321418 642836 803545 1285672 1607090 2089217 3214180 4178434 6428360 8356868 10446085 16713736 20892170 41784340 83568680