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BaseRepresentation
bin11111010110001000
320112010021
4133112020
513102032
62430224
71043215
oct372610
9215107
10128392
1188510
1262374
1346594
1434b0c
1528097
hex1f588

128392 has 16 divisors (see below), whose sum is σ = 262800. Its totient is φ = 58320.

The previous prime is 128389. The next prime is 128393. The reversal of 128392 is 293821.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (128393) 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, 642 + ... + 817.

It is an arithmetic number, because the mean of its divisors is an integer number (16425).

2128392 is an apocalyptic number.

It is an amenable number.

128392 is an abundant number, since it is smaller than the sum of its proper divisors (134408).

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

128392 is a wasteful number, since it uses less digits than its factorization.

128392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476 (or 1472 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 128392 is about 358.3182942581. The cubic root of 128392 is about 50.4482363426.

It can be divided in two parts, 128 and 392, that multiplied together give a square (50176 = 2242).

The spelling of 128392 in words is "one hundred twenty-eight thousand, three hundred ninety-two".