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128048893 = 7127144037
BaseRepresentation
bin1111010000111…
…01111011111101
322220221120001121
413220131323331
5230240031033
620412310541
73113253250
oct750357375
9286846047
10128048893
116630a035
1236a72451
13206b469b
1413013097
15b39562d
hex7a1defd

128048893 has 8 divisors (see below), whose sum is σ = 147494912. Its totient is φ = 108891216.

The previous prime is 128048887. The next prime is 128048909. The reversal of 128048893 is 398840821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128048893 - 25 = 128048861 is a prime.

It is a super-3 number, since 3×1280488933 (a number of 25 digits) contains 333 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 (128048803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71130 + ... + 72907.

It is an arithmetic number, because the mean of its divisors is an integer number (18436864).

Almost surely, 2128048893 is an apocalyptic number.

It is an amenable number.

128048893 is a deficient number, since it is larger than the sum of its proper divisors (19446019).

128048893 is a wasteful number, since it uses less digits than its factorization.

128048893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144171.

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 128048893 is about 11315.8690784226. The cubic root of 128048893 is about 504.0325798310.

The spelling of 128048893 in words is "one hundred twenty-eight million, forty-eight thousand, eight hundred ninety-three".

Divisors: 1 7 127 889 144037 1008259 18292699 128048893