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8144660 = 225407233
BaseRepresentation
bin11111000100011100010100
3120022210101002
4133010130110
54041112120
6450322432
7126141236
oct37043424
916283332
108144660
114663227
122889418
1318c2234
141120256
15aad375
hex7c4714

8144660 has 12 divisors (see below), whose sum is σ = 17103828. Its totient is φ = 3257856.

The previous prime is 8144651. The next prime is 8144671. The reversal of 8144660 is 664418.

It can be written as a sum of positive squares in 2 ways, for example, as 2365444 + 5779216 = 1538^2 + 2404^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 203597 + ... + 203636.

It is an arithmetic number, because the mean of its divisors is an integer number (1425319).

Almost surely, 28144660 is an apocalyptic number.

It is an amenable number.

8144660 is an abundant number, since it is smaller than the sum of its proper divisors (8959168).

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

8144660 is a wasteful number, since it uses less digits than its factorization.

8144660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407242 (or 407240 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 8144660 is about 2853.8850712669. The cubic root of 8144660 is about 201.1983059749.

The spelling of 8144660 in words is "eight million, one hundred forty-four thousand, six hundred sixty".

Divisors: 1 2 4 5 10 20 407233 814466 1628932 2036165 4072330 8144660