85189378 has 16 divisors (see below), whose sum is σ = 133632576. Its totient is φ = 40653360.

The previous prime is 85189339. The next prime is 85189381. The reversal of 85189378 is 87398158.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22288 + ... + 25828.

It is an arithmetic number, because the mean of its divisors is an integer number (8352036).

Almost surely, 2^85189378 is an apocalyptic number.

85189378 is a deficient number, since it is larger than the sum of its proper divisors (48443198).

85189378 is a wasteful number, since it uses less digits than its factorization.

85189378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4089.

The product of its digits is 483840, while the sum is 49.

The square root of 85189378 is about 9229.8092071288. The cubic root of 85189378 is about 440.0092594470.

The spelling of 85189378 in words is "eighty-five million, one hundred eighty-nine thousand, three hundred seventy-eight".