128231463 has 16 divisors (see below), whose sum is σ = 182209536. Its totient is φ = 80028960.

The previous prime is 128231443. The next prime is 128231473. The reversal of 128231463 is 364132821.

It is not a de Polignac number, because 128231463 - 2¹⁴ = 128215079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128231463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128231413) 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 15 ways as a sum of consecutive naturals, for example, 16528 + ... + 23013.

It is an arithmetic number, because the mean of its divisors is an integer number (11388096).

Almost surely, 2^128231463 is an apocalyptic number.

128231463 is a deficient number, since it is larger than the sum of its proper divisors (53978073).

128231463 is a wasteful number, since it uses less digits than its factorization.

128231463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39614.

The product of its digits is 6912, while the sum is 30.

The square root of 128231463 is about 11323.9331947870. The cubic root of 128231463 is about 504.2720131871.

The spelling of 128231463 in words is "one hundred twenty-eight million, two hundred thirty-one thousand, four hundred sixty-three".