128489746386 has 8 divisors (see below), whose sum is σ = 256979492784. Its totient is φ = 42829915460.

The previous prime is 128489746369. The next prime is 128489746453. The reversal of 128489746386 is 683647984821.

It is a happy number.

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

128489746386 is an admirable number.

It is a super-2 number, since 2×128489746386² (a number of 23 digits) contains 22 as substring.

It is a Curzon 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, 10707478860 + ... + 10707478871.

It is an arithmetic number, because the mean of its divisors is an integer number (32122436598).

Almost surely, 2^128489746386 is an apocalyptic number.

128489746386 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128489746386 is a wasteful number, since it uses less digits than its factorization.

128489746386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21414957736.

The product of its digits is 111476736, while the sum is 66.

The spelling of 128489746386 in words is "one hundred twenty-eight billion, four hundred eighty-nine million, seven hundred forty-six thousand, three hundred eighty-six".