128776276 has 12 divisors (see below), whose sum is σ = 225832320. Its totient is φ = 64252760.

The previous prime is 128776253. The next prime is 128776331. The reversal of 128776276 is 672677821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31690 + ... + 35521.

It is an arithmetic number, because the mean of its divisors is an integer number (18819360).

Almost surely, 2^128776276 is an apocalyptic number.

It is an amenable number.

128776276 is a deficient number, since it is larger than the sum of its proper divisors (97056044).

128776276 is a wasteful number, since it uses less digits than its factorization.

128776276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67694 (or 67692 counting only the distinct ones).

The product of its digits is 395136, while the sum is 46.

The square root of 128776276 is about 11347.9635177419. The cubic root of 128776276 is about 504.9851657244.

The spelling of 128776276 in words is "one hundred twenty-eight million, seven hundred seventy-six thousand, two hundred seventy-six".