128486943 has 24 divisors (see below), whose sum is σ = 202413120. Its totient is φ = 78062400.

The previous prime is 128486929. The next prime is 128486951. The reversal of 128486943 is 349684821.

It is a happy number.

128486943 is a `hidden beast` number, since 128 + 486 + 9 + 43 = 666.

It is not a de Polignac number, because 128486943 - 2⁹ = 128486431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128486983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2293 + ... + 16193.

It is an arithmetic number, because the mean of its divisors is an integer number (8433880).

Almost surely, 2^128486943 is an apocalyptic number.

128486943 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

128486943 is a deficient number, since it is larger than the sum of its proper divisors (73926177).

128486943 is a wasteful number, since it uses less digits than its factorization.

128486943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13999 (or 13996 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 128486943 is about 11335.2081145429. The cubic root of 128486943 is about 504.6066839121.

It can be divided in two parts, 12848 and 6943, that added together give a palindrome (19791).

The spelling of 128486943 in words is "one hundred twenty-eight million, four hundred eighty-six thousand, nine hundred forty-three".