85228397 has 4 divisors (see below), whose sum is σ = 85254780. Its totient is φ = 85202016.

The previous prime is 85228387. The next prime is 85228417. The reversal of 85228397 is 79382258.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54967396 + 30261001 = 7414^2 + 5501^2 .

It is a cyclic number.

It is not a de Polignac number, because 85228397 - 2⁶ = 85228333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85228337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7538 + ... + 15075.

It is an arithmetic number, because the mean of its divisors is an integer number (21313695).

Almost surely, 2^85228397 is an apocalyptic number.

85228397 is the 7538-th pentagonal number.

It is an amenable number.

85228397 is a deficient number, since it is larger than the sum of its proper divisors (26383).

85228397 is a wasteful number, since it uses less digits than its factorization.

85228397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26382.

The product of its digits is 241920, while the sum is 44.

The square root of 85228397 is about 9231.9227141479. The cubic root of 85228397 is about 440.0764278394.

The spelling of 85228397 in words is "eighty-five million, two hundred twenty-eight thousand, three hundred ninety-seven".