128023742 has 16 divisors (see below), whose sum is σ = 239421312. Its totient is φ = 49879320.

The previous prime is 128023733. The next prime is 128023759. The reversal of 128023742 is 247320821.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 415508 + ... + 415815.

It is an arithmetic number, because the mean of its divisors is an integer number (14963832).

Almost surely, 2^128023742 is an apocalyptic number.

128023742 is a deficient number, since it is larger than the sum of its proper divisors (111397570).

128023742 is a wasteful number, since it uses less digits than its factorization.

128023742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831343.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 128023742 is about 11314.7577084090. The cubic root of 128023742 is about 503.9995774541. Note that the first 3 decimals are identical.

The spelling of 128023742 in words is "one hundred twenty-eight million, twenty-three thousand, seven hundred forty-two".