85825820 has 12 divisors (see below), whose sum is σ = 180234264. Its totient is φ = 34330320.

The previous prime is 85825813. The next prime is 85825823. The reversal of 85825820 is 2852858.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85825823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2145626 + ... + 2145665.

It is an arithmetic number, because the mean of its divisors is an integer number (15019522).

Almost surely, 2^85825820 is an apocalyptic number.

It is an amenable number.

85825820 is an abundant number, since it is smaller than the sum of its proper divisors (94408444).

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

85825820 is a wasteful number, since it uses less digits than its factorization.

85825820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4291300 (or 4291298 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 38.

The square root of 85825820 is about 9264.2225793641. Note that the first 3 decimals coincide. The cubic root of 85825820 is about 441.1022981745.

The spelling of 85825820 in words is "eighty-five million, eight hundred twenty-five thousand, eight hundred twenty".