128401018 has 8 divisors (see below), whose sum is σ = 192704148. Its totient is φ = 64166304.

The previous prime is 128401003. The next prime is 128401079. The reversal of 128401018 is 810104821.

It can be written as a sum of positive squares in 2 ways, for example, as 110313009 + 18088009 = 10503^2 + 4253^2 .

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

It is a super-3 number, since 3×128401018³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128400983 and 128401001.

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, 12121 + ... + 20092.

Almost surely, 2^128401018 is an apocalyptic number.

128401018 is a deficient number, since it is larger than the sum of its proper divisors (64303130).

128401018 is a wasteful number, since it uses less digits than its factorization.

128401018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34208.

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 128401018 is about 11331.4172988201. The cubic root of 128401018 is about 504.4941744303.

Adding to 128401018 its reverse (810104821), we get a palindrome (938505839).

The spelling of 128401018 in words is "one hundred twenty-eight million, four hundred one thousand, eighteen".