128381463 has 64 divisors (see below), whose sum is σ = 229248000. Its totient is φ = 69455232.

The previous prime is 128381443. The next prime is 128381471. The reversal of 128381463 is 364183821.

It is not a de Polignac number, because 128381463 - 2⁸ = 128381207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128381443) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 323181 + ... + 323577.

It is an arithmetic number, because the mean of its divisors is an integer number (3582000).

Almost surely, 2^128381463 is an apocalyptic number.

128381463 is a deficient number, since it is larger than the sum of its proper divisors (100866537).

128381463 is a wasteful number, since it uses less digits than its factorization.

128381463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501 (or 495 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 128381463 is about 11330.5543994987. The cubic root of 128381463 is about 504.4685622646.

The spelling of 128381463 in words is "one hundred twenty-eight million, three hundred eighty-one thousand, four hundred sixty-three".