128001980 has 12 divisors (see below), whose sum is σ = 268804200. Its totient is φ = 51200784.

The previous prime is 128001961. The next prime is 128001997. The reversal of 128001980 is 89100821.

It is a congruent 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, 3200030 + ... + 3200069.

It is an arithmetic number, because the mean of its divisors is an integer number (22400350).

Almost surely, 2^128001980 is an apocalyptic number.

128001980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128001980 is an abundant number, since it is smaller than the sum of its proper divisors (140802220).

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

128001980 is a wasteful number, since it uses less digits than its factorization.

128001980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6400108 (or 6400106 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 128001980 is about 11313.7960031105. The cubic root of 128001980 is about 503.9710185317.

The spelling of 128001980 in words is "one hundred twenty-eight million, one thousand, nine hundred eighty".