128540210 has 8 divisors (see below), whose sum is σ = 231372396. Its totient is φ = 51416080.

The previous prime is 128540197. The next prime is 128540221. The reversal of 128540210 is 12045821.

It can be written as a sum of positive squares in 2 ways, for example, as 122832889 + 5707321 = 11083^2 + 2389^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6427001 + ... + 6427020.

Almost surely, 2^128540210 is an apocalyptic number.

128540210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128540210 is a deficient number, since it is larger than the sum of its proper divisors (102832186).

128540210 is a wasteful number, since it uses less digits than its factorization.

128540210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12854028.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 128540210 is about 11337.5574970979. The cubic root of 128540210 is about 504.6764060957.

The spelling of 128540210 in words is "one hundred twenty-eight million, five hundred forty thousand, two hundred ten".