128023695 has 12 divisors (see below), whose sum is σ = 221907816. Its totient is φ = 68279280.

The previous prime is 128023657. The next prime is 128023697. The reversal of 128023695 is 596320821.

It is not a de Polignac number, because 128023695 - 2⁸ = 128023439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128023697) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1422441 + ... + 1422530.

It is an arithmetic number, because the mean of its divisors is an integer number (18492318).

Almost surely, 2^128023695 is an apocalyptic number.

128023695 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128023695 is a deficient number, since it is larger than the sum of its proper divisors (93884121).

128023695 is a wasteful number, since it uses less digits than its factorization.

128023695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2844982 (or 2844979 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 128023695 is about 11314.7556314752. The cubic root of 128023695 is about 503.9995157781. Note that the first 3 decimals are identical.

The spelling of 128023695 in words is "one hundred twenty-eight million, twenty-three thousand, six hundred ninety-five".