128706984 has 48 divisors (see below), whose sum is σ = 398380320. Its totient is φ = 36773280.

The previous prime is 128706973. The next prime is 128707043. The reversal of 128706984 is 489607821.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127182 + ... + 128189.

It is an arithmetic number, because the mean of its divisors is an integer number (8299590).

Almost surely, 2^128706984 is an apocalyptic number.

128706984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

128706984 is an abundant number, since it is smaller than the sum of its proper divisors (269673336).

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

128706984 is a wasteful number, since it uses less digits than its factorization.

128706984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255390 (or 255383 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 128706984 is about 11344.9100481229. The cubic root of 128706984 is about 504.8945752546.

The spelling of 128706984 in words is "one hundred twenty-eight million, seven hundred six thousand, nine hundred eighty-four".