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8728141 = 89281349
BaseRepresentation
bin100001010010…
…111001001101
3121102102202111
4201102321031
54213300031
6511024021
7134121322
oct41227115
917372674
108728141
114a21644
122b0b011
131a679a6
141232b49
15b761b1
hex852e4d

8728141 has 8 divisors (see below), whose sum is σ = 8883000. Its totient is φ = 8574720.

The previous prime is 8728129. The next prime is 8728147. The reversal of 8728141 is 1418278.

It can be written as a sum of positive squares in 4 ways, for example, as 1572516 + 7155625 = 1254^2 + 2675^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8728141 - 211 = 8726093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8728147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24835 + ... + 25183.

It is an arithmetic number, because the mean of its divisors is an integer number (1110375).

Almost surely, 28728141 is an apocalyptic number.

It is an amenable number.

8728141 is a deficient number, since it is larger than the sum of its proper divisors (154859).

8728141 is a wasteful number, since it uses less digits than its factorization.

8728141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719.

The product of its digits is 3584, while the sum is 31.

The square root of 8728141 is about 2954.3427357028. The cubic root of 8728141 is about 205.8925272811.

The spelling of 8728141 in words is "eight million, seven hundred twenty-eight thousand, one hundred forty-one".

Divisors: 1 89 281 349 25009 31061 98069 8728141