128077845 has 16 divisors (see below), whose sum is σ = 234199680. Its totient is φ = 58549824.

The previous prime is 128077837. The next prime is 128077871. The reversal of 128077845 is 548770821.

It is not a de Polignac number, because 128077845 - 2³ = 128077837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128077797 and 128077806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 609790 + ... + 609999.

It is an arithmetic number, because the mean of its divisors is an integer number (14637480).

Almost surely, 2^128077845 is an apocalyptic number.

128077845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128077845 is a deficient number, since it is larger than the sum of its proper divisors (106121835).

128077845 is a wasteful number, since it uses less digits than its factorization.

128077845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219804.

The product of its (nonzero) digits is 125440, while the sum is 42.

The square root of 128077845 is about 11317.1482715391. The cubic root of 128077845 is about 504.0705644144.

The spelling of 128077845 in words is "one hundred twenty-eight million, seventy-seven thousand, eight hundred forty-five".