85840458 has 16 divisors (see below), whose sum is σ = 187288416. Its totient is φ = 26012240.

The previous prime is 85840453. The next prime is 85840459. The reversal of 85840458 is 85404858.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85840453) 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, 650241 + ... + 650372.

It is an arithmetic number, because the mean of its divisors is an integer number (11705526).

Almost surely, 2^85840458 is an apocalyptic number.

85840458 is an abundant number, since it is smaller than the sum of its proper divisors (101447958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85840458 is a wasteful number, since it uses less digits than its factorization.

85840458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300629.

The product of its (nonzero) digits is 204800, while the sum is 42.

The square root of 85840458 is about 9265.0125741955. The cubic root of 85840458 is about 441.1273741109.

Subtracting from 85840458 its reverse (85404858), we obtain a square (435600 = 660²).

The spelling of 85840458 in words is "eighty-five million, eight hundred forty thousand, four hundred fifty-eight".