128203471 has 8 divisors (see below), whose sum is σ = 140477184. Its totient is φ = 116032920.

The previous prime is 128203459. The next prime is 128203489. The reversal of 128203471 is 174302821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128203471 - 2²¹ = 126106319 is a prime.

It is a super-3 number, since 3×128203471³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128213471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23175 + ... + 28168.

It is an arithmetic number, because the mean of its divisors is an integer number (17559648).

Almost surely, 2^128203471 is an apocalyptic number.

128203471 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

128203471 is a deficient number, since it is larger than the sum of its proper divisors (12273713).

128203471 is a wasteful number, since it uses less digits than its factorization.

128203471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51581.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 128203471 is about 11322.6971610125. The cubic root of 128203471 is about 504.2353175403.

The spelling of 128203471 in words is "one hundred twenty-eight million, two hundred three thousand, four hundred seventy-one".