128903655 has 16 divisors (see below), whose sum is σ = 206593920. Its totient is φ = 68632608.

The previous prime is 128903653. The next prime is 128903681. The reversal of 128903655 is 556309821.

It is not a de Polignac number, because 128903655 - 2¹ = 128903653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128903653) 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, 2344 + ... + 16226.

It is an arithmetic number, because the mean of its divisors is an integer number (12912120).

Almost surely, 2^128903655 is an apocalyptic number.

128903655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128903655 is a deficient number, since it is larger than the sum of its proper divisors (77690265).

128903655 is a wasteful number, since it uses less digits than its factorization.

128903655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14510.

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 128903655 is about 11353.5745472516. The cubic root of 128903655 is about 505.1516128119.

The spelling of 128903655 in words is "one hundred twenty-eight million, nine hundred three thousand, six hundred fifty-five".