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129178068 = 223103104513
BaseRepresentation
bin1111011001100…
…01100111010100
3100000001220222220
413230301213110
5231032144233
620452422340
73125665305
oct754614724
9300056886
10129178068
1166a10438
12373179b0
13209bb636
14132287ac
15b519eb3
hex7b319d4

129178068 has 24 divisors (see below), whose sum is σ = 304344768. Its totient is φ = 42640896.

The previous prime is 129178067. The next prime is 129178069. The reversal of 129178068 is 860871921.

It is an interprime number because it is at equal distance from previous prime (129178067) and next prime (129178069).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129178061) 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, 51021 + ... + 53492.

It is an arithmetic number, because the mean of its divisors is an integer number (12681032).

Almost surely, 2129178068 is an apocalyptic number.

It is an amenable number.

129178068 is an abundant number, since it is smaller than the sum of its proper divisors (175166700).

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

129178068 is a wasteful number, since it uses less digits than its factorization.

129178068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104623 (or 104621 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 42.

The square root of 129178068 is about 11365.6529948789. The cubic root of 129178068 is about 505.5098181185.

The spelling of 129178068 in words is "one hundred twenty-nine million, one hundred seventy-eight thousand, sixty-eight".

Divisors: 1 2 3 4 6 12 103 206 309 412 618 1236 104513 209026 313539 418052 627078 1254156 10764839 21529678 32294517 43059356 64589034 129178068