85909398 has 16 divisors (see below), whose sum is σ = 181926000. Its totient is φ = 26951936.

The previous prime is 85909387. The next prime is 85909433. The reversal of 85909398 is 89390958.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 85909398.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421023 + ... + 421226.

It is an arithmetic number, because the mean of its divisors is an integer number (11370375).

Almost surely, 2^85909398 is an apocalyptic number.

85909398 is an abundant number, since it is smaller than the sum of its proper divisors (96016602).

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

85909398 is a wasteful number, since it uses less digits than its factorization.

85909398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842271.

The product of its (nonzero) digits is 699840, while the sum is 51.

The square root of 85909398 is about 9268.7322757754. The cubic root of 85909398 is about 441.2454349267.

The spelling of 85909398 in words is "eighty-five million, nine hundred nine thousand, three hundred ninety-eight".