128904503 has 16 divisors (see below), whose sum is σ = 162032640. Its totient is φ = 99817056.

The previous prime is 128904499. The next prime is 128904511. The reversal of 128904503 is 305409821.

It is a cyclic number.

It is not a de Polignac number, because 128904503 - 2² = 128904499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128904503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128904703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10793 + ... + 19346.

It is an arithmetic number, because the mean of its divisors is an integer number (10127040).

Almost surely, 2^128904503 is an apocalyptic number.

128904503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

128904503 is a deficient number, since it is larger than the sum of its proper divisors (33128137).

128904503 is a wasteful number, since it uses less digits than its factorization.

128904503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30206.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 128904503 is about 11353.6118922570. The cubic root of 128904503 is about 505.1527205323.

The spelling of 128904503 in words is "one hundred twenty-eight million, nine hundred four thousand, five hundred three".