128423007 has 12 divisors (see below), whose sum is σ = 193565424. Its totient is φ = 81892800.

The previous prime is 128423003. The next prime is 128423023. The reversal of 128423007 is 700324821.

It is not a de Polignac number, because 128423007 - 2² = 128423003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128423003) 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 11 ways as a sum of consecutive naturals, for example, 309994 + ... + 310407.

It is an arithmetic number, because the mean of its divisors is an integer number (16130452).

Almost surely, 2^128423007 is an apocalyptic number.

128423007 is a deficient number, since it is larger than the sum of its proper divisors (65142417).

128423007 is a wasteful number, since it uses less digits than its factorization.

128423007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620430 (or 620427 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 128423007 is about 11332.3875242598. The cubic root of 128423007 is about 504.5229714222.

Adding to 128423007 its reverse (700324821), we get a palindrome (828747828).

The spelling of 128423007 in words is "one hundred twenty-eight million, four hundred twenty-three thousand, seven".