128408847 has 8 divisors (see below), whose sum is σ = 195670656. Its totient is φ = 73376472.

The previous prime is 128408831. The next prime is 128408869. The reversal of 128408847 is 748804821.

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

It is not a de Polignac number, because 128408847 - 2⁴ = 128408831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128408799 and 128408808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128408807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3057333 + ... + 3057374.

It is an arithmetic number, because the mean of its divisors is an integer number (24458832).

Almost surely, 2^128408847 is an apocalyptic number.

128408847 is a deficient number, since it is larger than the sum of its proper divisors (67261809).

128408847 is an equidigital number, since it uses as much as digits as its factorization.

128408847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6114717.

The product of its (nonzero) digits is 114688, while the sum is 42.

The square root of 128408847 is about 11331.7627490166. The cubic root of 128408847 is about 504.5044277359.

The spelling of 128408847 in words is "one hundred twenty-eight million, four hundred eight thousand, eight hundred forty-seven".