128276636 has 12 divisors (see below), whose sum is σ = 231725760. Its totient is φ = 62069280.

The previous prime is 128276627. The next prime is 128276639. The reversal of 128276636 is 636672821.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 128276593 and 128276602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128276639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 517121 + ... + 517368.

It is an arithmetic number, because the mean of its divisors is an integer number (19310480).

Almost surely, 2^128276636 is an apocalyptic number.

It is an amenable number.

128276636 is a deficient number, since it is larger than the sum of its proper divisors (103449124).

128276636 is a wasteful number, since it uses less digits than its factorization.

128276636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034524 (or 1034522 counting only the distinct ones).

The product of its digits is 145152, while the sum is 41.

The square root of 128276636 is about 11325.9275999805. The cubic root of 128276636 is about 504.3312207189.

The spelling of 128276636 in words is "one hundred twenty-eight million, two hundred seventy-six thousand, six hundred thirty-six".