128786471 has 12 divisors (see below), whose sum is σ = 143161200. Its totient is φ = 115753440.

The previous prime is 128786467. The next prime is 128786479. The reversal of 128786471 is 174687821.

It is not a de Polignac number, because 128786471 - 2² = 128786467 is a prime.

It is a super-3 number, since 3×128786471³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128786479) 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 in 11 ways as a sum of consecutive naturals, for example, 4790 + ... + 16748.

It is an arithmetic number, because the mean of its divisors is an integer number (11930100).

Almost surely, 2^128786471 is an apocalyptic number.

128786471 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

128786471 is a deficient number, since it is larger than the sum of its proper divisors (14374729).

128786471 is a wasteful number, since it uses less digits than its factorization.

128786471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12070 (or 12059 counting only the distinct ones).

The product of its digits is 150528, while the sum is 44.

The square root of 128786471 is about 11348.4127083923. The cubic root of 128786471 is about 504.9984916466.

The spelling of 128786471 in words is "one hundred twenty-eight million, seven hundred eighty-six thousand, four hundred seventy-one".