85128994 has 8 divisors (see below), whose sum is σ = 129599568. Its totient is φ = 41929140.

The previous prime is 85128973. The next prime is 85129039. The reversal of 85128994 is 49982158.

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, 317512 + ... + 317779.

It is an arithmetic number, because the mean of its divisors is an integer number (16199946).

Almost surely, 2^85128994 is an apocalyptic number.

85128994 is a deficient number, since it is larger than the sum of its proper divisors (44470574).

85128994 is a wasteful number, since it uses less digits than its factorization.

85128994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635360.

The product of its digits is 207360, while the sum is 46.

The square root of 85128994 is about 9226.5374870533. The cubic root of 85128994 is about 439.9052723072.

The spelling of 85128994 in words is "eighty-five million, one hundred twenty-eight thousand, nine hundred ninety-four".