128022903 has 16 divisors (see below), whose sum is σ = 200820960. Its totient is φ = 80327808.

The previous prime is 128022889. The next prime is 128022943. The reversal of 128022903 is 309220821.

It is a happy number.

It is not a de Polignac number, because 128022903 - 2⁴ = 128022887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128022943) 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 15 ways as a sum of consecutive naturals, for example, 139000 + ... + 139917.

It is an arithmetic number, because the mean of its divisors is an integer number (12551310).

Almost surely, 2^128022903 is an apocalyptic number.

128022903 is a deficient number, since it is larger than the sum of its proper divisors (72798057).

128022903 is a wasteful number, since it uses less digits than its factorization.

128022903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278943 (or 278937 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 128022903 is about 11314.7206328747. The cubic root of 128022903 is about 503.9984764693.

The spelling of 128022903 in words is "one hundred twenty-eight million, twenty-two thousand, nine hundred three".