128404523 has 8 divisors (see below), whose sum is σ = 138532800. Its totient is φ = 118312128.

The previous prime is 128404513. The next prime is 128404537. The reversal of 128404523 is 325404821.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128404523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128404513) 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, 1283 + ... + 16076.

It is an arithmetic number, because the mean of its divisors is an integer number (17316600).

Almost surely, 2^128404523 is an apocalyptic number.

128404523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

128404523 is a deficient number, since it is larger than the sum of its proper divisors (10128277).

128404523 is a wasteful number, since it uses less digits than its factorization.

128404523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17941.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 128404523 is about 11331.5719562645. The cubic root of 128404523 is about 504.4987648300.

The spelling of 128404523 in words is "one hundred twenty-eight million, four hundred four thousand, five hundred twenty-three".