85123390 has 16 divisors (see below), whose sum is σ = 167151600. Its totient is φ = 30953920.

The previous prime is 85123373. The next prime is 85123397. The reversal of 85123390 is 9332158.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85123397) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 386815 + ... + 387034.

It is an arithmetic number, because the mean of its divisors is an integer number (10446975).

Almost surely, 2^85123390 is an apocalyptic number.

85123390 is a deficient number, since it is larger than the sum of its proper divisors (82028210).

85123390 is a wasteful number, since it uses less digits than its factorization.

85123390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773867.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 85123390 is about 9226.2337928323. The cubic root of 85123390 is about 439.8956191792.

The spelling of 85123390 in words is "eighty-five million, one hundred twenty-three thousand, three hundred ninety".