128023385 has 32 divisors (see below), whose sum is σ = 180299520. Its totient is φ = 85459968.

The previous prime is 128023373. The next prime is 128023393. The reversal of 128023385 is 583320821.

It is a cyclic number.

It is not a de Polignac number, because 128023385 - 2¹² = 128019289 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 227114 + ... + 227676.

It is an arithmetic number, because the mean of its divisors is an integer number (5634360).

Almost surely, 2^128023385 is an apocalyptic number.

It is an amenable number.

128023385 is a deficient number, since it is larger than the sum of its proper divisors (52276135).

128023385 is an equidigital number, since it uses as much as digits as its factorization.

128023385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 128023385 is about 11314.7419325409. The cubic root of 128023385 is about 503.9991089784. Note that the first 3 decimals are identical.

The spelling of 128023385 in words is "one hundred twenty-eight million, twenty-three thousand, three hundred eighty-five".