128235523 has 16 divisors (see below), whose sum is σ = 141020320. Its totient is φ = 115893504.

The previous prime is 128235493. The next prime is 128235529. The reversal of 128235523 is 325532821.

It is a cyclic number.

It is not a de Polignac number, because 128235523 - 2⁹ = 128235011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128235529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154273 + ... + 155101.

It is an arithmetic number, because the mean of its divisors is an integer number (8813770).

Almost surely, 2^128235523 is an apocalyptic number.

128235523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

128235523 is a deficient number, since it is larger than the sum of its proper divisors (12784797).

128235523 is a wasteful number, since it uses less digits than its factorization.

128235523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078.

The product of its digits is 14400, while the sum is 31.

The square root of 128235523 is about 11324.1124597030. The cubic root of 128235523 is about 504.2773351331.

The spelling of 128235523 in words is "one hundred twenty-eight million, two hundred thirty-five thousand, five hundred twenty-three".