85821710 has 16 divisors (see below), whose sum is σ = 166362336. Its totient is φ = 31687968.

The previous prime is 85821709. The next prime is 85821719. The reversal of 85821710 is 1712858.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85821719) 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, 329954 + ... + 330213.

It is an arithmetic number, because the mean of its divisors is an integer number (10397646).

Almost surely, 2^85821710 is an apocalyptic number.

85821710 is a deficient number, since it is larger than the sum of its proper divisors (80540626).

85821710 is a wasteful number, since it uses less digits than its factorization.

85821710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660187.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 85821710 is about 9264.0007556131. Note that the first 3 decimals coincide. The cubic root of 85821710 is about 441.0952569392.

The spelling of 85821710 in words is "eighty-five million, eight hundred twenty-one thousand, seven hundred ten".