128486636 has 12 divisors (see below), whose sum is σ = 225728328. Its totient is φ = 63992832.

The previous prime is 128486621. The next prime is 128486707. The reversal of 128486636 is 636684821.

It is a super-3 number, since 3×128486636³ (a number of 25 digits) contains 333 as substring.

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, 61466 + ... + 63521.

It is an arithmetic number, because the mean of its divisors is an integer number (18810694).

Almost surely, 2^128486636 is an apocalyptic number.

It is an amenable number.

128486636 is a deficient number, since it is larger than the sum of its proper divisors (97241692).

128486636 is a wasteful number, since it uses less digits than its factorization.

128486636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125248 (or 125246 counting only the distinct ones).

The product of its digits is 331776, while the sum is 44.

The square root of 128486636 is about 11335.1945726573. The cubic root of 128486636 is about 504.6062820182.

The spelling of 128486636 in words is "one hundred twenty-eight million, four hundred eighty-six thousand, six hundred thirty-six".