128488463 has 4 divisors (see below), whose sum is σ = 129760728. Its totient is φ = 127216200.

The previous prime is 128488453. The next prime is 128488471. The reversal of 128488463 is 364884821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128488463 - 2¹⁶ = 128422927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128488433) 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 3 ways as a sum of consecutive naturals, for example, 635981 + ... + 636182.

It is an arithmetic number, because the mean of its divisors is an integer number (32440182).

Almost surely, 2^128488463 is an apocalyptic number.

128488463 is a deficient number, since it is larger than the sum of its proper divisors (1272265).

128488463 is a wasteful number, since it uses less digits than its factorization.

128488463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272264.

The product of its digits is 294912, while the sum is 44.

The square root of 128488463 is about 11335.2751620770. The cubic root of 128488463 is about 504.6086737359.

The spelling of 128488463 in words is "one hundred twenty-eight million, four hundred eighty-eight thousand, four hundred sixty-three".