85236820 has 12 divisors (see below), whose sum is σ = 178997364. Its totient is φ = 34094720.

The previous prime is 85236787. The next prime is 85236821. The reversal of 85236820 is 2863258.

It can be written as a sum of positive squares in 2 ways, for example, as 23833924 + 61402896 = 4882^2 + 7836^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85236821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2130901 + ... + 2130940.

It is an arithmetic number, because the mean of its divisors is an integer number (14916447).

Almost surely, 2^85236820 is an apocalyptic number.

It is an amenable number.

85236820 is an abundant number, since it is smaller than the sum of its proper divisors (93760544).

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

85236820 is a wasteful number, since it uses less digits than its factorization.

85236820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4261850 (or 4261848 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 85236820 is about 9232.3788917050. The cubic root of 85236820 is about 440.0909247355.

The spelling of 85236820 in words is "eighty-five million, two hundred thirty-six thousand, eight hundred twenty".