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128000008 = 23109229641
BaseRepresentation
bin1111010000100…
…10000000001000
322220212002000001
413220102000020
5230232000013
620411252344
73112660603
oct750220010
9286762001
10128000008
1166286334
1236a4a0b4
1320698366
1412ddd33a
15b385ddd
hex7a12008

128000008 has 32 divisors (see below), whose sum is σ = 243639000. Its totient is φ = 63037440.

The previous prime is 128000003. The next prime is 128000009. The reversal of 128000008 is 800000821.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 122810724 + 5189284 = 11082^2 + 2278^2 .

It is not an unprimeable number, because it can be changed into a prime (128000003) 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, 199368 + ... + 200008.

Almost surely, 2128000008 is an apocalyptic number.

It is an amenable number.

128000008 is a deficient number, since it is larger than the sum of its proper divisors (115638992).

128000008 is a wasteful number, since it uses less digits than its factorization.

128000008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985 (or 981 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 128000008 is about 11313.7088525381. The cubic root of 128000008 is about 503.9684304573.

Adding to 128000008 its reverse (800000821), we get a palindrome (928000829).

It can be divided in two parts, 12800000 and 8, that multiplied together give a 5-th power (102400000 = 405).

The spelling of 128000008 in words is "one hundred twenty-eight million, eight", and thus it is an aban number.

Divisors: 1 2 4 8 109 218 229 436 458 641 872 916 1282 1832 2564 5128 24961 49922 69869 99844 139738 146789 199688 279476 293578 558952 587156 1174312 16000001 32000002 64000004 128000008