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128039093 = 7131407023
BaseRepresentation
bin1111010000110…
…11100010110101
322220221001121122
413220123202311
5230234222333
620412153325
73113212550
oct750334265
9286831548
10128039093
1166302736
1236a68845
13206b00a0
141300d697
15b392798
hex7a1b8b5

128039093 has 8 divisors (see below), whose sum is σ = 157586688. Its totient is φ = 101305584.

The previous prime is 128039071. The next prime is 128039113. The reversal of 128039093 is 390930821.

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 128039093 - 26 = 128039029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128039033) 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, 703421 + ... + 703602.

It is an arithmetic number, because the mean of its divisors is an integer number (19698336).

Almost surely, 2128039093 is an apocalyptic number.

128039093 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

128039093 is a deficient number, since it is larger than the sum of its proper divisors (29547595).

128039093 is a wasteful number, since it uses less digits than its factorization.

128039093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407043.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 128039093 is about 11315.4360499276. The cubic root of 128039093 is about 504.0197210831.

The spelling of 128039093 in words is "one hundred twenty-eight million, thirty-nine thousand, ninety-three".

Divisors: 1 7 13 91 1407023 9849161 18291299 128039093