128491367 has 8 divisors (see below), whose sum is σ = 131389440. Its totient is φ = 125625240.

The previous prime is 128491351. The next prime is 128491369. The reversal of 128491367 is 763194821.

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 128491367 - 2⁴ = 128491351 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 (128491369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242 + ... + 16032.

It is an arithmetic number, because the mean of its divisors is an integer number (16423680).

Almost surely, 2^128491367 is an apocalyptic number.

128491367 is a deficient number, since it is larger than the sum of its proper divisors (2898073).

128491367 is a wasteful number, since it uses less digits than its factorization.

128491367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15973.

The product of its digits is 72576, while the sum is 41.

The square root of 128491367 is about 11335.4032570527. The cubic root of 128491367 is about 504.6124753030.

The spelling of 128491367 in words is "one hundred twenty-eight million, four hundred ninety-one thousand, three hundred sixty-seven".