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128260033 = 1111660003
BaseRepresentation
bin1111010010100…
…01011111000001
322221100021200121
413221101133001
5230313310113
620421020241
73115122646
oct751213701
9287307617
10128260033
1166443730
1236b54681
1320759815
1413069dcd
15b3d7e8d
hex7a517c1

128260033 has 4 divisors (see below), whose sum is σ = 139920048. Its totient is φ = 116600020.

The previous prime is 128260031. The next prime is 128260037. The reversal of 128260033 is 330062821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 128260033 - 21 = 128260031 is a prime.

It is a super-2 number, since 2×1282600332 = 32901272130322178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128260031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5829991 + ... + 5830012.

It is an arithmetic number, because the mean of its divisors is an integer number (34980012).

Almost surely, 2128260033 is an apocalyptic number.

It is an amenable number.

128260033 is a deficient number, since it is larger than the sum of its proper divisors (11660015).

128260033 is a wasteful number, since it uses less digits than its factorization.

128260033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11660014.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 128260033 is about 11325.1946120144. The cubic root of 128260033 is about 504.3094610470.

The spelling of 128260033 in words is "one hundred twenty-eight million, two hundred sixty thousand, thirty-three".

Divisors: 1 11 11660003 128260033