128083786 has 8 divisors (see below), whose sum is σ = 192209184. Its totient is φ = 64014060.

The previous prime is 128083783. The next prime is 128083817. The reversal of 128083786 is 687380821.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (128083783) 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, 7590 + ... + 17713.

It is an arithmetic number, because the mean of its divisors is an integer number (24026148).

Almost surely, 2^128083786 is an apocalyptic number.

128083786 is a deficient number, since it is larger than the sum of its proper divisors (64125398).

128083786 is a wasteful number, since it uses less digits than its factorization.

128083786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27836.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 128083786 is about 11317.4107462794. The cubic root of 128083786 is about 504.0783582082.

The spelling of 128083786 in words is "one hundred twenty-eight million, eighty-three thousand, seven hundred eighty-six".