128535398 has 4 divisors (see below), whose sum is σ = 192803100. Its totient is φ = 64267698.

The previous prime is 128535397. The next prime is 128535401. The reversal of 128535398 is 893535821.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128535397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32133848 + ... + 32133851.

It is an arithmetic number, because the mean of its divisors is an integer number (48200775).

Almost surely, 2^128535398 is an apocalyptic number.

128535398 is a deficient number, since it is larger than the sum of its proper divisors (64267702).

128535398 is an equidigital number, since it uses as much as digits as its factorization.

128535398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64267701.

The product of its digits is 259200, while the sum is 44.

The square root of 128535398 is about 11337.3452800909. The cubic root of 128535398 is about 504.6701083694.

The spelling of 128535398 in words is "one hundred twenty-eight million, five hundred thirty-five thousand, three hundred ninety-eight".