85211478 has 48 divisors (see below), whose sum is σ = 203450832. Its totient is φ = 25560000.

The previous prime is 85211473. The next prime is 85211479. The reversal of 85211478 is 87411258.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85211473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17868 + ... + 22128.

It is an arithmetic number, because the mean of its divisors is an integer number (4238559).

Almost surely, 2^85211478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85211478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101725416).

85211478 is an abundant number, since it is smaller than the sum of its proper divisors (118239354).

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

85211478 is a wasteful number, since it uses less digits than its factorization.

85211478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4381 (or 4378 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 85211478 is about 9231.0063373394. The cubic root of 85211478 is about 440.0473055199.

It can be divided in two parts, 8521 and 1478, that added together give a palindrome (9999).

The spelling of 85211478 in words is "eighty-five million, two hundred eleven thousand, four hundred seventy-eight".