128606786 has 72 divisors (see below), whose sum is σ = 253572480. Its totient is φ = 47876400.

The previous prime is 128606767. The next prime is 128606789. The reversal of 128606786 is 687606821.

It is not an unprimeable number, because it can be changed into a prime (128606789) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1627895 + ... + 1627973.

It is an arithmetic number, because the mean of its divisors is an integer number (3521840).

Almost surely, 2^128606786 is an apocalyptic number.

128606786 is a deficient number, since it is larger than the sum of its proper divisors (124965694).

128606786 is a wasteful number, since it uses less digits than its factorization.

128606786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 128606786 is about 11340.4931991514. The cubic root of 128606786 is about 504.7635216042.

The spelling of 128606786 in words is "one hundred twenty-eight million, six hundred six thousand, seven hundred eighty-six".