128321835 has 8 divisors (see below), whose sum is σ = 205314960. Its totient is φ = 68438304.

The previous prime is 128321821. The next prime is 128321861. The reversal of 128321835 is 538123821.

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

It is not a de Polignac number, because 128321835 - 2⁴ = 128321819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128321796 and 128321805.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4277380 + ... + 4277409.

It is an arithmetic number, because the mean of its divisors is an integer number (25664370).

Almost surely, 2^128321835 is an apocalyptic number.

128321835 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128321835 is a deficient number, since it is larger than the sum of its proper divisors (76993125).

128321835 is an equidigital number, since it uses as much as digits as its factorization.

128321835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8554797.

The product of its digits is 11520, while the sum is 33.

The square root of 128321835 is about 11327.9228016437. The cubic root of 128321835 is about 504.3904484181.

The spelling of 128321835 in words is "one hundred twenty-eight million, three hundred twenty-one thousand, eight hundred thirty-five".