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87244000669 = 784191480393
BaseRepresentation
bin101000101000000100…
…1011100110110011101
322100012011222102210001
41101100021130312131
52412133431010134
6104025045414301
76205662525040
oct1212011346635
9270164872701
1087244000669
1133aaaa66aa1
1214aa9a0a391
1382c4b5c847
144318c8cc57
152409434414
hex145025cd9d

87244000669 has 8 divisors (see below), whose sum is σ = 99719339840. Its totient is φ = 74771639136.

The previous prime is 87244000661. The next prime is 87244000673. The reversal of 87244000669 is 96600044278.

It is a happy number.

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 87244000669 - 23 = 87244000661 is a prime.

It is a super-2 number, since 2×872440006692 (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87244000661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681264 + ... + 799129.

It is an arithmetic number, because the mean of its divisors is an integer number (12464917480).

Almost surely, 287244000669 is an apocalyptic number.

87244000669 is the 170533-rd hex number.

It is an amenable number.

87244000669 is a deficient number, since it is larger than the sum of its proper divisors (12475339171).

87244000669 is a wasteful number, since it uses less digits than its factorization.

87244000669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1488819.

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 87244000669 in words is "eighty-seven billion, two hundred forty-four million, six hundred sixty-nine", and thus it is an aban number.

Divisors: 1 7 8419 58933 1480393 10362751 12463428667 87244000669