85707856 has 40 divisors (see below), whose sum is σ = 180550944. Its totient is φ = 39177600.

The previous prime is 85707827. The next prime is 85707857. The reversal of 85707856 is 65870758.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85707857) 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, 20331 + ... + 24181.

Almost surely, 2^85707856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85707856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90275472).

85707856 is an abundant number, since it is smaller than the sum of its proper divisors (94843088).

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

85707856 is a wasteful number, since it uses less digits than its factorization.

85707856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3979 (or 3973 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 46.

The square root of 85707856 is about 9257.8537469545. The cubic root of 85707856 is about 440.9001132946.

The spelling of 85707856 in words is "eighty-five million, seven hundred seven thousand, eight hundred fifty-six".