128972006 has 8 divisors (see below), whose sum is σ = 194539320. Its totient is φ = 64125568.

The previous prime is 128971993. The next prime is 128972021. The reversal of 128972006 is 600279821.

It is a happy number.

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

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179771 + ... + 180486.

It is an arithmetic number, because the mean of its divisors is an integer number (24317415).

Almost surely, 2^128972006 is an apocalyptic number.

128972006 is a deficient number, since it is larger than the sum of its proper divisors (65567314).

128972006 is a wasteful number, since it uses less digits than its factorization.

128972006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360438.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 128972006 is about 11356.5842576014. The cubic root of 128972006 is about 505.2408823699.

The spelling of 128972006 in words is "one hundred twenty-eight million, nine hundred seventy-two thousand, six".