128040404120 has 32 divisors (see below), whose sum is σ = 288375394320. Its totient is φ = 51165586560.

The previous prime is 128040404077. The next prime is 128040404171. The reversal of 128040404120 is 21404040821.

It is a self number, because there is not a number n which added to its sum of digits gives 128040404120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1539446 + ... + 1620485.

Almost surely, 2^128040404120 is an apocalyptic number.

128040404120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128040404120 is an abundant number, since it is smaller than the sum of its proper divisors (160334990200).

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

128040404120 is a wasteful number, since it uses less digits than its factorization.

128040404120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3160955 (or 3160951 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

Adding to 128040404120 its reverse (21404040821), we get a palindrome (149444444941).

The spelling of 128040404120 in words is "one hundred twenty-eight billion, forty million, four hundred four thousand, one hundred twenty".