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BaseRepresentation
bin1000111100001…
…10100011100110
312020010101201012
410132012203212
5123200000123
611235302222
71600330001
oct436064346
9166111635
1075000038
1139376703
122114a972
13126cc629
149d64538
1568b7378
hex47868e6

75000038 has 4 divisors (see below), whose sum is σ = 112500060. Its totient is φ = 37500018.

The previous prime is 75000031. The next prime is 75000047. The reversal of 75000038 is 83000057.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83000057 = 711857151.

It is a junction number, because it is equal to n+sod(n) for n = 74999977 and 75000022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75000031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18750008 + ... + 18750011.

It is an arithmetic number, because the mean of its divisors is an integer number (28125015).

Almost surely, 275000038 is an apocalyptic number.

75000038 is a deficient number, since it is larger than the sum of its proper divisors (37500022).

75000038 is a wasteful number, since it uses less digits than its factorization.

75000038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37500021.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 75000038 is about 8660.2562317751. The cubic root of 75000038 is about 421.7164038741.

The spelling of 75000038 in words is "seventy-five million, thirty-eight", and thus it is an aban number and an uban number.

Divisors: 1 2 37500019 75000038