856707072 has 208 divisors, whose sum is σ = 2554019328. Its totient is φ = 253624320.

The previous prime is 856707037. The next prime is 856707073. The reversal of 856707072 is 270707658.

It is a tau number, because it is divible by the number of its divisors (208).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856707073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4951978 + ... + 4952150.

Almost surely, 2^856707072 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 856707072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1277009664).

856707072 is an abundant number, since it is smaller than the sum of its proper divisors (1697312256).

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

856707072 is a wasteful number, since it uses less digits than its factorization.

856707072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 164640, while the sum is 42.

The square root of 856707072 is about 29269.5587940782. The cubic root of 856707072 is about 949.7532404350.

The spelling of 856707072 in words is "eight hundred fifty-six million, seven hundred seven thousand, seventy-two".