128800771 has 8 divisors (see below), whose sum is σ = 141959664. Its totient is φ = 115883520.

The previous prime is 128800757. The next prime is 128800783. The reversal of 128800771 is 177008821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128800771 - 2⁷ = 128800643 is a prime.

It is a super-2 number, since 2×128800771² = 33179277220388882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128800741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59290 + ... + 61423.

It is an arithmetic number, because the mean of its divisors is an integer number (17744958).

Almost surely, 2^128800771 is an apocalyptic number.

128800771 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

128800771 is a deficient number, since it is larger than the sum of its proper divisors (13158893).

128800771 is a wasteful number, since it uses less digits than its factorization.

128800771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120821.

The product of its (nonzero) digits is 6272, while the sum is 34.

The square root of 128800771 is about 11349.0427349623. The cubic root of 128800771 is about 505.0171820445.

The spelling of 128800771 in words is "one hundred twenty-eight million, eight hundred thousand, seven hundred seventy-one".