85128370 has 8 divisors (see below), whose sum is σ = 153231084. Its totient is φ = 34051344.

The previous prime is 85128353. The next prime is 85128389. The reversal of 85128370 is 7382158.

It can be written as a sum of positive squares in 2 ways, for example, as 84879369 + 249001 = 9213^2 + 499^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 4256409 + ... + 4256428.

Almost surely, 2^85128370 is an apocalyptic number.

85128370 is a deficient number, since it is larger than the sum of its proper divisors (68102714).

85128370 is a wasteful number, since it uses less digits than its factorization.

85128370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8512844.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 85128370 is about 9226.5036714890. The cubic root of 85128370 is about 439.9041974617.

The spelling of 85128370 in words is "eighty-five million, one hundred twenty-eight thousand, three hundred seventy".