85219278 has 16 divisors (see below), whose sum is σ = 177849216. Its totient is φ = 27171320.

The previous prime is 85219273. The next prime is 85219297. The reversal of 85219278 is 87291258.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85219273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308628 + ... + 308903.

It is an arithmetic number, because the mean of its divisors is an integer number (11115576).

Almost surely, 2^85219278 is an apocalyptic number.

85219278 is an abundant number, since it is smaller than the sum of its proper divisors (92629938).

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

85219278 is a wasteful number, since it uses less digits than its factorization.

85219278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617559.

The product of its digits is 80640, while the sum is 42.

The square root of 85219278 is about 9231.4288168192. The cubic root of 85219278 is about 440.0607319751.

The spelling of 85219278 in words is "eighty-five million, two hundred nineteen thousand, two hundred seventy-eight".